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The peregrine falcon is the fastest animal overall at 389 km/h in a hunting dive. On land, the cheetah reigns at 112 km/h — though it can only sustain top speed for about 460 meters.

Canada has more lakes than all other countries combined — over 2 million, holding about 60% of the world's lakes. It contains 20% of the world's total fresh water.

Saturn holds the record with 146 confirmed moons as of 2023, overtaking Jupiter (95 moons). Saturn's largest moon, Titan, is bigger than Mercury and has a thick atmosphere with methane lakes.

Hydrogen makes up approximately 75% of all normal (baryonic) matter in the universe. Helium is second at ~24%. All other elements combined account for less than 2%.

The Inca civilization built Machu Picchu around 1450 CE as a royal estate for Emperor Pachacuti. It was abandoned roughly 100 years later during the Spanish conquest and "rediscovered" in 1911.

Brazil is the world's largest coffee producer, generating about 40% of the global supply — approximately 3.6 million tonnes per year. It has held this position for over 150 years.

O negative (O−) is the universal red blood cell donor — it can be given to patients of all ABO and Rh blood types. Only about 7% of the population has O− blood.

The Nile is traditionally measured as the longest river at 6,650 km, flowing through 11 African countries. The Amazon is a close contender at 6,400–7,062 km depending on the measurement method.

Jupiter is by far the largest planet, with a diameter of about 143,000 km — more than 11 Earths across and over twice the mass of all other planets combined.

The giraffe is the tallest living animal, standing up to about 5.5 meters (18 feet) tall. Its legs alone are taller than many adult humans.

The blue whale is the largest animal known to have ever existed, reaching up to 30 meters long and around 180 tonnes — heavier than any dinosaur.

The mosquito is by far the deadliest animal to humans, causing an estimated 700,000 or more deaths a year by spreading diseases like malaria and dengue.

The ostrich is the world largest and heaviest living bird, standing up to 2.8 meters tall and weighing as much as 155 kilograms. It cannot fly, but it can sprint at 70 km/h.

Rhodium is usually the most expensive precious metal, often trading well above gold and platinum, thanks to its rarity and use in catalytic converters.

Diamond is the hardest known natural material, scoring a perfect 10 on the Mohs scale. It is made of pure carbon under immense pressure.

The Pacific Ocean is the largest, covering about 165 million km² — more than all the land on Earth combined and roughly a third of the planet's surface.

The ocean quahog clam can live over 500 years, and the Greenland shark may live 300–500 years. Some jellyfish may even be biologically immortal.

Aluminium is the most abundant metal in Earth crust, making up about 8% of it by weight. Only oxygen and silicon are more common overall.

Mercury is the smallest planet in our solar system and the closest to the Sun, only slightly larger than Earth Moon.

Giant tortoises are among the longest-lived land animals, with some living well over 150 years.

Venus is the hottest planet, with surface temperatures around 465 degrees Celsius — hot enough to melt lead.

The bee hummingbird of Cuba is the world smallest bird, weighing less than 2 grams and about the size of a large insect.

The box jellyfish is often called the most venomous animal, with venom potent enough to kill a human within minutes.

India is now the world most populous country, having overtaken China, with over 1.4 billion people.

The Rafflesia arnoldii of Southeast Asia produces the largest single flower, up to a metre wide, and smells of rotting flesh.

The sailfish is widely considered the fastest fish, capable of bursts up to around 100 kilometres per hour.

Nitrogen makes up about 78% of Earth atmosphere, far more than oxygen, which accounts for around 21%.

Antarctica is the largest desert on Earth. Deserts are defined by low precipitation, not heat, and Antarctica is extremely dry.

The polar bear is the largest land carnivore, with big males weighing up to around 700 kilograms.

A Great Basin bristlecone pine in California is among the oldest known living trees, at over 4,800 years old.

The Andean condor is among the largest birds of prey, with a wingspan reaching about 3.3 metres.

Plants release oxygen during photosynthesis, using sunlight to turn carbon dioxide and water into food and oxygen.

The Amazon is the world largest tropical rainforest, covering about 5.5 million square kilometres across South America.

The Pacific Ocean is the deepest, containing the Mariana Trench at 10,994 metres — the deepest point on Earth.

English is generally cited as having the largest vocabulary, with estimates ranging from 170,000 to over 1 million words depending on the criteria.

The cheetah is the fastest land animal, reaching speeds of up to 112 km/h in short bursts.

Tungsten has the highest melting point of any metal, at 3,422 °C (6,192 °F).

France has the most time zones of any country — 12 in total — thanks to its overseas territories spanning the globe.

English is the most widely spoken language overall (about 1.5 billion speakers), while Mandarin Chinese has the most native speakers (about 920 million).

The brain uses the most energy relative to its size, consuming about 20% of the body total energy despite being only 2% of body weight.

A honey fungus (Armillaria ostoyae) in Oregon, USA, spanning about 9.6 km², is considered the largest living organism by area.

Neptune and Uranus are believed to rain diamonds deep in their atmospheres, where extreme pressure crystallises carbon into diamond.

Limpet teeth are the strongest known natural material, with a tensile strength of up to 6.5 GPa — stronger than spider silk.

Africa has the most countries of any continent, with 54 internationally recognised sovereign states.

Sumer, in southern Mesopotamia (modern Iraq), is generally considered the oldest known civilization, emerging around 4500-4000 BC.

The Rüppell griffon vulture holds the record at 11,300 metres — confirmed when one was struck by a plane at that altitude.

The femur (thighbone) is the longest and strongest bone, typically about one-quarter of a person total height.

Don Juan Pond in Antarctica is the saltiest body of water on Earth, with a salinity of over 40% — about 12 times saltier than the ocean.

The koala sleeps up to 22 hours per day, though some sources give the brown bat or the little pocket mouse similar records.

Mauna Loa in Hawaii is the largest active volcano on Earth by volume (about 75,000 km³) and surface area.

Astatine is the rarest naturally occurring element, with less than 30 grams estimated to exist in Earth crust at any given time.

Eagles and other birds of prey have the sharpest vision, with visual acuity roughly 4-8 times better than humans.

The University of al-Qarawiyyin in Fez, Morocco, founded in 859 AD, is recognised by Guinness and UNESCO as the oldest continuously operating university.

Saffron is the world most expensive spice, costing $5,000-$10,000 per kilogram due to the labour-intensive harvesting of crocus flowers.

The pitch drop experiment at the University of Queensland, started in 1927, is the world longest-running laboratory experiment.

The horned dung beetle (Onthophagus taurus) can pull 1,141 times its own body weight, making it the strongest insect relative to its size.

Antarctica is the driest continent, receiving an average of only about 166 mm of precipitation per year, mostly as snow.

Bone flutes found in German caves, dating to about 40,000 years ago, are the oldest known musical instruments.

Venus has the longest day of any planet in our solar system: one Venusian day (sidereal rotation) is about 243 Earth days.

Steel is the most recycled material in the world, with a global recycling rate of about 85-90% for structural steel.

Hyperion, a coast redwood (Sequoia sempervirens) in Northern California, stands at 115.92 metres — the tallest known tree on Earth.

Sirius (the Dog Star) is the brightest star visible from Earth, with an apparent magnitude of -1.46.

Bats are the only mammals capable of true sustained flight, with over 1,400 species worldwide.

Indonesia has the most active volcanoes of any country, with about 130 historically active volcanoes — roughly 13% of all active volcanoes on Earth — due to its position on the Pacific Ring of Fire.

Tamil is often cited as the oldest continuously spoken language, with a literary tradition spanning over 2,000 years; other strong candidates include Chinese, Greek, Hebrew, and Basque.

The Indian Ocean is the warmest ocean overall, with average surface temperatures of about 22-28 degrees Celsius, because most of it lies in the tropics and it is largely enclosed by warm landmasses.

Bananas are the most consumed fruit in the world, with global production exceeding 120 million tonnes per year — more than apples, oranges, and grapes combined in many markets.

Mauna Kea in Hawaii is the tallest mountain from base to peak at about 10,211 metres (33,500 feet) — but over half is below sea level, so only 4,207 metres rise above the ocean surface.

The sperm whale has the largest brain of any animal ever known to exist, weighing about 7.8 kg — roughly five times heavier than the human brain.

Fluorine is the most reactive element, reacting violently with virtually every other element and compound — it is the most electronegative element on the periodic table and the strongest known oxidising agent.

The Namib Desert in southwestern Africa is considered the world oldest desert, having been arid or semi-arid for at least 55-80 million years — since the Late Cretaceous period.

Neptune has the strongest measured winds in the solar system, with speeds reaching approximately 2,100 km/h (580 m/s) — despite being the farthest planet from the Sun and receiving very little solar energy.

The liver is the only internal organ in the human body that can regenerate to its full size from as little as 25% of its original tissue — a remarkable ability unique among human organs.

The Arctic tern holds the record for the longest migration of any animal, flying roughly 71,000 km annually on a round trip from Arctic breeding grounds to Antarctic feeding grounds and back.

Natural rubber (latex from Hevea brasiliensis) is one of the most elastic common materials, capable of stretching to 7-8 times its original length and returning to shape; among engineered materials, some silicone elastomers can stretch over 1,000%.

The Amazon River has the most tributaries of any river, with over 1,100 named tributaries — including 17 that are each longer than 1,500 km — draining the largest river basin on Earth.

Adult mayflies (order Ephemeroptera) have the shortest lifespan of any insect — some species live only 5 minutes to 24 hours as adults, just long enough to mate and lay eggs.

Sweden has the most islands of any country, with approximately 267,570 islands — though most are tiny, uninhabited rocky skerries in its Baltic Sea archipelagos.

The saltwater crocodile has the strongest measured bite force of any living animal at about 16,460 newtons (3,700 pounds-force) — roughly 10 times the bite force of a great white shark.

Jupiter has arguably the most extreme weather in the solar system: its Great Red Spot is a storm larger than Earth that has raged for at least 350 years, with wind speeds exceeding 640 km/h.

Diamond is the hardest naturally occurring substance, rated 10 on the Mohs hardness scale; however, several synthetic materials, including wurtzite boron nitride and Q-carbon, may be even harder under certain conditions.

A honey fungus (Armillaria ostoyae) in the Blue Mountains of eastern Oregon, USA, is the largest known organism on Earth — its underground mycelial network spans approximately 9.6 square kilometres and may be 2,400-8,650 years old.

The Great Chilean Earthquake (Valdivia Earthquake) on 22 May 1960 is the strongest earthquake ever recorded, measuring magnitude 9.5 on the moment magnitude scale.

Pure fats and oils have the highest caloric density of any food at about 9 kilocalories per gram; among common whole foods, macadamia nuts (~7.2 kcal/g) and pecans (~6.9 kcal/g) are among the most calorie-dense.

Large, fast-growing deciduous trees like oaks, beeches, and maples produce the most oxygen per individual tree — a mature oak produces roughly 100 kg of oxygen per year, enough for about 2-3 people.

Bridgmanite (a magnesium iron silicate perovskite) is the most abundant mineral in Earth, making up about 38% of the planet total volume — but it exists only in the lower mantle under extreme pressure.

Tardigrades can survive without food for decades in a desiccated cryptobiotic state; among active animals, the olm (Proteus anguinus, a cave salamander) can survive up to 10 years without eating.

The Sumerians of ancient Mesopotamia (modern Iraq) developed the first known writing system — cuneiform — around 3400-3100 BCE, initially for recording economic transactions.

Lithium is the lightest metal, with a density of just 0.534 g/cm3 — so light it floats on water (and even on some oils) — and it is also the lightest solid element.

The January 2022 eruption of Hunga Tonga-Hunga Ha'apai in Tonga was the most powerful volcanic event in decades, but the eruption that most recently caused significant global cooling was Mount Pinatubo (Philippines) in June 1991, which lowered global temperatures by about 0.5 degrees Celsius for two years.

The human egg cell (ovum) is the largest cell in the body at about 120 micrometres in diameter — just barely visible to the naked eye; the longest cell is a motor neuron, which can extend over 1 metre from the spinal cord to the foot.

Jupiter has the strongest surface gravity of any planet in our solar system at about 24.8 m/s squared (2.53 times Earth gravity), meaning a 70 kg person would weigh about 177 kg on Jupiter.

Mandarin Chinese has the most native speakers of any language, with approximately 920 million people speaking it as their first language, followed by Spanish (~475 million) and English (~373 million).

The ocean quahog clam and certain sponges and jellyfish are among the longest-lived animals known.

Rhodium is usually the most expensive precious metal, often priced well above gold and platinum.

China and Russia are tied with 14 bordering countries each, the most of any nation.

Jupiter spins the fastest, completing a full rotation in under 10 hours despite its huge size.

Great Basin bristlecone pines are the longest-lived individual trees, over 4,800 years old.

The black marlin is often cited as the fastest fish, reaching bursts around 130 km/h.

Monaco is the most densely populated country, with over 18,000 people per square kilometre.

The Sargasso Sea is the only sea on Earth with no land coastline, bounded by ocean currents.

Tamil is among the oldest languages still in everyday use, with a literary history over 2,000 years old.

Canada has the longest coastline of any country, stretching about 202,000 kilometres.

The Arctic tern migrates the farthest, flying up to 90,000 km a year between the poles.

After the Sun, Proxima Centauri is the closest star, about 4.24 light-years away.

The United States is the worlds largest oil producer, thanks largely to shale extraction.

The platypus and echidnas are the only mammals that lay eggs instead of giving live birth.

Nitrogen is the most abundant gas in Earths atmosphere, making up about 78 percent of it.

Great apes such as chimpanzees, along with dolphins, elephants, and certain birds like crows and parrots, are considered among the most intelligent animals, each excelling in different mental skills.

The Ruppell griffon vulture holds the record for the highest confirmed bird flight, having collided with an aircraft at about 11,300 metres, higher than the cruising altitude of many airliners.

Among common types, AB negative is the rarest, found in well under one percent of people, but the truly rarest is Rh-null, or golden blood, known in only a few dozen people worldwide.

The smallest bone in the human body is the stapes, a tiny stirrup-shaped bone in the middle ear that measures only about 3 millimetres long.

Counting overseas territories, France spans the most time zones, with 12, while Russia has the most of any single contiguous landmass, at 11.

Russia is by far the largest country in the world by land area, covering about 17.1 million square kilometres, nearly twice the size of the next largest country.

Vatican City is the smallest country in the world, covering just about 0.49 square kilometres and home to only a few hundred residents.

Hydrogen is by far the most abundant element in the universe, making up about 75 percent of ordinary matter, while oxygen is the most abundant element in the Earth crust.

The largest fish is the whale shark, a gentle filter-feeder that can grow to around 12 metres or more in length, far bigger than any other fish.

English is the most spoken language in the world by total number of speakers, with around 1.5 billion, while Mandarin Chinese has the most native speakers, at roughly 940 million.

The blue whale is the largest mammal and the largest animal ever known to have lived, reaching up to about 30 metres long and weighing as much as 200 tonnes.

The Pacific Ocean is the deepest, containing the Mariana Trench, whose lowest point, the Challenger Deep, plunges to about 10,935 metres below sea level.

The skin is the largest organ of the human body, covering an area of about two square metres in adults and accounting for roughly 15 percent of body weight; the liver is the largest internal organ.

Venus is the hottest planet in the solar system, with surface temperatures around 465 degrees Celsius, even though Mercury orbits closer to the Sun.

By the toxicity of its venom, the inland taipan of Australia is the most venomous snake, with a single bite containing enough venom to kill many adult humans.

The Cuvier beaked whale holds the record among mammals, with dives recorded lasting over three and a half hours on a single breath.

The tiny creatures called tardigrades, or water bears, can survive exposure to the vacuum and radiation of space, as proven in orbital experiments.

The tiny Etruscan shrew is often said to have one of the fastest metabolisms, with a heart that can beat around 1,500 times a minute.

The ocean quahog, a type of clam, can live over 500 years, and one specimen named Ming was found to be about 507 years old.

The common snail can have thousands of tiny teeth on a ribbon-like tongue called a radula, with some snails having well over 10,000.

The sea otter has the densest fur of any animal, with up to about one million hairs packed into a single square inch of skin.

The sperm whale produces the loudest sounds of any animal, with clicks reaching around 230 decibels underwater, while the blue whale is the loudest for sustained calls.

The koala is often cited as sleeping up to around 22 hours a day, while some bats and the sloth also spend most of their time resting or asleep.

The sociable weaver of southern Africa builds the largest communal nests, huge shared structures that can house hundreds of birds, while the bald eagle builds the largest single nest.

Flightless birds include the ostrich, emu, cassowary, kiwi, and penguins, which have lost the ability to fly and adapted to life on the ground or in water.

The wandering albatross has the largest wingspan of any living bird, reaching up to about 3.5 metres from tip to tip.

Astatine is the rarest naturally occurring element on Earth, with an estimated total of less than a gram present in the entire crust at any time.

The Australian Kakadu plum has the highest known vitamin C content of any fruit, with far more than oranges, and the camu camu berry is also extremely rich in it.

Diamond is the hardest natural gemstone, scoring the maximum 10 on the Mohs scale of mineral hardness.

Aluminium is the most abundant metal in Earths crust, making up about 8 percent of it by weight.

K2, the second-highest mountain on Earth, is widely regarded as the hardest and most dangerous major peak to climb, far deadlier than Everest.

Certain species of bamboo are the fastest-growing plants, with some able to grow up to about 90 centimetres in a single day.

The Amazon River in South America carries by far the most water of any river, discharging around 209,000 cubic metres per second into the Atlantic.

The tube-lipped nectar bat of Ecuador has the longest tongue relative to its body of any mammal, longer than its entire body.

The ostrich lays the largest egg of any living bird, weighing about 1.5 kilograms, though the extinct elephant bird laid far bigger ones.

The United States has the largest economy by nominal GDP, worth roughly 27 to 29 trillion US dollars, about a quarter of world output.

France is the most visited country, welcoming around 100 million international tourists a year.

Football (soccer) is the most popular sport, with an estimated 3.5 billion fans worldwide.

The Bible is the best-selling book ever, with an estimated 5 billion or more copies printed and distributed.

Google.com is the most visited website in the world, receiving tens of billions of visits every month.

Asia is the largest continent, covering about 44.6 million square kilometres and home to around 60 percent of all people.

Venus comes closest to Earth, but on average Mercury is actually our nearest planetary neighbour.

Minecraft is the best-selling video game ever, with more than 300 million copies sold.

Baby Shark Dance by Pinkfong is the most viewed YouTube video, with more than 14 billion views.

Wang and Li are the most common surnames in the world, each shared by roughly 100 million people in China.

The United States has won the most Olympic medals, with more than 2,600 at the Summer Games alone.

The French Bulldog is the most popular dog breed in the US, ending the Labrador Retriever 31-year reign in 2022.

Hartsfield-Jackson Atlanta International is the busiest airport, handling about 108 million passengers in 2024.

Finland drinks the most coffee per person, about 12 kilograms per person every year.

Facebook is the most used social network, with around 3 billion monthly active users.

Christianity is the largest religion, with about 2.3 billion followers, followed by Islam with about 2 billion.

Sudan has the most pyramids, with around 200 to 255, far more than the roughly 120 in Egypt.

Vitamin D is made in the skin when it is exposed to UVB rays from sunlight.

San Marino is the oldest surviving republic, founded in 301 AD, though Egypt and Japan have far older civilisations.

The Face with Tears of Joy emoji 😂 is the most used emoji in the world.

Finland, which ranked number one in every World Happiness Report from 2018 through 2025, eight years in a row.

For English speakers, Mandarin Chinese, Arabic, Japanese, Korean and Cantonese are rated hardest, each needing about 88 weeks of full-time study.

James Cameron’s Avatar (2009) holds the record, having earned about 2.92 billion dollars at the worldwide box office.

Blinding Lights by The Weeknd is the most streamed song in Spotify history, and the first to pass 4 billion streams, in 2023.

Instagram’s own account has the most followers, while footballer Cristiano Ronaldo is the most followed person, with over 650 million followers as of 2025.

Python leads most popularity rankings such as the TIOBE Index, while JavaScript and TypeScript dominate web development and GitHub activity.

The Toyota Corolla, with more than 50 million sold worldwide since its launch in 1966.

The longest word in major dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, with 45 letters, a lung disease caused by fine volcanic dust.

The United States, with more than 400 Nobel laureates, far ahead of the United Kingdom and Germany.

India, with about 1.46 billion people in 2025, overtook China as the world’s most populous country in 2023.

Three films share the record of 11 Oscars: Ben-Hur (1959), Titanic (1997) and The Lord of the Rings: The Return of the King (2003).

Switzerland, where people eat roughly 10 kilograms of chocolate per person each year, the highest rate in the world.

123456 is the world’s most common password, topping most annual leaked-password studies and cracked in under a second.

Turkey drinks the most tea per person, around 3 kilograms each year, while China drinks the most tea overall.

Singapore and Zurich usually top global cost-of-living rankings, with Hong Kong, Geneva and New York close behind.

Brazil has won the men’s FIFA World Cup a record five times, in 1958, 1962, 1970, 1994 and 2002.

Lewis Hamilton and Michael Schumacher share the record with seven Formula 1 drivers’ world championships each.

Real Madrid has won the European Cup and Champions League a record 15 times, the latest in 2024.

Sweden and Ireland share the record with seven Eurovision Song Contest victories each.

American swimmer Michael Phelps has won 23 Olympic gold medals, and 28 medals in total, both all-time records.

Novak Djokovic holds the men’s record with 24 Grand Slam singles titles, level with Margaret Court’s all-time record of 24.

Lionel Messi has won the Ballon d’Or a record eight times, most recently in 2023.

The Boston Celtics have won a record 18 NBA championships, the latest in 2024, one more than the Los Angeles Lakers.

Magnus Carlsen of Norway reached a FIDE rating of 2882 in May 2014, the highest ever recorded.

In recent rankings by Forbes and Bloomberg, Elon Musk has been the world’s richest person, though the top spot can change as share prices move.

Robert Wadlow of Alton, Illinois, is the tallest person in recorded history, measuring 2.72 metres, or 8 feet 11.1 inches.

Jeanne Calment of France lived for 122 years and 164 days, the longest verified human lifespan.

The Nokia 1100, launched in 2003, is usually named the best-selling single phone model, with about 250 million sold.

Sony’s PlayStation 2 is the best-selling video game console of all time, with more than 160 million units sold.

Iceland has topped the Global Peace Index every year since 2008, making it widely regarded as the safest country in the world.

Saturn. All four giant planets have rings, but Saturn’s bright, icy system is by far the largest and most spectacular.

Uranus. Although Neptune is farther from the Sun, Uranus has recorded the lowest atmospheric temperature, around −224°C.

Ganymede, a moon of Jupiter. At about 5,268 km across, it is even wider than the planet Mercury.

Venus. Its thick, reflective clouds make it the brightest natural object in the night sky after the Moon.

The United States, with more than 800 billionaires in recent Forbes rankings, well ahead of China and India.

Australia. Its mainland covers about 7.7 million km², making it both the smallest continent and a country in its own right.

The Arctic Ocean. At about 14 million km² it is the smallest and shallowest of the five oceans.

The Danyang–Kunshan Grand Bridge in China, a railway viaduct about 164.8 km long that opened in 2011.

The longest railway tunnel is Switzerland’s 57 km Gotthard Base Tunnel; the longest tunnel of any kind is the 137 km Delaware Aqueduct in New York.

The Statue of Unity in Gujarat, India. At 182 metres it is about twice the height of the Statue of Liberty including its pedestal.

St Peter’s Basilica in Vatican City is usually named the largest church by interior size, though a basilica in Ivory Coast claims a larger total area.

The Masjid al-Haram in Mecca, Saudi Arabia, which surrounds the Kaaba and can hold more than 2 million worshippers during the Hajj.

The Louvre in Paris is the largest art museum by gallery space, while the Smithsonian Institution is the largest museum complex.

Shinjuku Station in Tokyo, which handled around 3.5 million passengers a day before the pandemic.

Shanghai and Beijing, each with more than 800 km of lines, trade the title of the world’s largest metro by route length.

The United States, with well over 13,000 airports and airfields, several times more than any other country.

A 1955 Mercedes-Benz 300 SLR Uhlenhaut Coupé, sold in 2022 for €135 million, about $143 million.

The Cullinan Diamond, a 3,106-carat gem found in South Africa in 1905. Its largest cut stones are part of the British Crown Jewels.

A millipede called Eumillipes persephone, found in Western Australia, with up to 1,306 legs — the first known animal with more than 1,000.

The colossal squid, whose eyes can measure about 27 cm across — roughly the size of a football.

The blue whale. Its heart weighs around 180 kg and can beat as slowly as two times a minute during a dive.

The African bush elephant. Adult males typically weigh around 6 tonnes and can stand up to 4 metres at the shoulder.

It depends how you measure: the giant weta is among the heaviest, a Chinese stick insect is the longest, and the white witch moth has the widest wings.

The Goliath birdeater of South America is the heaviest spider, while the giant huntsman of Laos has the widest leg span, about 30 cm.

The green anaconda is the heaviest snake, while the reticulated python is the longest, with wild specimens approaching 7 metres.

The saltwater crocodile. Big males can grow beyond 6 metres and weigh around a tonne.

The great white shark, which has been involved in more recorded unprovoked bites on people than any other species, followed by tiger and bull sharks.

The tiger, especially the Siberian or Amur tiger, whose males can weigh around 300 kg and reach over 3 metres long including the tail.

Giant long-necked titanosaurs such as Argentinosaurus and Patagotitan, estimated at up to around 35 metres long and 60 to 70 tonnes or more.

The Etruscan shrew is the lightest, at about 2 grams, while the bumblebee bat is the smallest by body length, around 3 cm.

The Chihuahua, which typically weighs under 3 kg. The smallest living dog recognised by Guinness, Pearl, is a Chihuahua just 9.14 cm tall.

Brown, shared by an estimated 70% or more of people worldwide. Green is the rarest of the common eye colours.

O positive is the most common blood type worldwide, although A positive is more common in some countries.

It depends on the definition, but the masseter, the main jaw muscle, is often named the strongest for the force it produces relative to its size.

Tooth enamel. It is about 96% mineral, harder than bone, but it cannot grow back once it is lost.

Oxygen makes up about 65% of your body mass, mostly locked up in water. By number of atoms, hydrogen wins.

Pepper X, named the world’s hottest chilli by Guinness in 2023, with an average of about 2.69 million Scoville Heat Units.

China and India are the two giants, together growing more than half the world’s rice. China has long been top, though recent estimates put India narrowly ahead.

Ivory Coast (Côte d’Ivoire), which grows around 40% of the world’s cocoa beans. Neighbouring Ghana is second.

Papua New Guinea, where around 840 living languages are spoken — more than in any other country.

Mercury, which races around the Sun in just 88 Earth days.

MrBeast, which overtook T-Series in 2024 to become the most subscribed channel, passing 400 million subscribers in 2025.

Beyoncé, with 35 Grammy wins as of the 2025 ceremony, where she also won Album of the Year for Cowboy Carter.

The Marvel Cinematic Universe, whose films have earned more than $30 billion at the global box office.

Katharine Hepburn, who won four Best Actress Oscars between 1934 and 1982.

South Sudan, which became independent from Sudan on 9 July 2011 and joined the United Nations as its 193rd member.

Hong Kong, which has more buildings over 150 metres tall than any other city, followed by Shenzhen and New York.

The Arabian Peninsula, covering about 3.2 million km² between the Red Sea, the Arabian Sea and the Persian Gulf.

Italy, with around 60 sites, narrowly ahead of China. Germany, France and Spain follow.

Russia, with about 815 million hectares of forest — roughly a fifth of all the forest on Earth.

The Arctic tern migrates the farthest of any bird, traveling roughly 71,000 km round-trip each year.

Edamame (young soybeans) tops the list at about 18 grams of protein per cooked cup.

Certain bamboo species can grow up to 91 cm (about 3 feet) in a single day.

Italy leads with 59 UNESCO World Heritage Sites.

Diamond is the hardest natural mineral, rated 10 on the Mohs scale.

The greater wax moth can detect sounds up to 300 kHz — the highest frequency of any known animal.

Vatican City has the smallest population of any recognized country, with roughly 800 residents.

The liver can regenerate to its full size from as little as 25 % of its original tissue.

Damascus, Syria, has been continuously inhabited for over 10,000 years.

The ovum (egg cell) is the largest human cell, about 0.1 mm in diameter.

Lake Baikal in Siberia, Russia, reaches a maximum depth of 1,642 metres.

The French horn is widely regarded by musicians and educators as the most difficult orchestral instrument to master.

Football (soccer) is played by an estimated 250 million people in over 200 countries.

Antarctica is the largest desert, receiving less than 200 mm of precipitation per year.

Saffron is the world's most expensive spice, selling for $5,000 to $10,000 per kilogram.

Cross-country skiing and running at high intensity burn the most calories, exceeding 1,000 per hour.

The Citarum River in Indonesia is often cited as the most polluted river globally.

Hummingbirds are the only birds that can fly backwards with sustained, controlled flight.

Vatican City has about 800 residents, making it the least populated country.

Venus is the hottest planet despite being farther from the Sun than Mercury, due to its runaway greenhouse effect.

Vitamin D deficiency affects an estimated 1 billion people globally.

Silver is the best conductor of electricity among all metals, with a resistivity of just 1.59 × 10⁻⁸ ohm-meters.

Antarctica is technically the world's coldest (and largest) desert, with temperatures dropping below −89°C.

The Great Barrier Reef, visible from space, is the largest structure built by living organisms.

China is the world's largest food producer by total agricultural output.

AB-negative is the rarest ABO blood type, found in less than 1 % of the global population.

The saltwater crocodile has the strongest measured bite force of any living animal, at about 16,460 newtons.

The pronghorn antelope can sustain speeds of about 55 km/h over several kilometres.

Mandarin Chinese has the most native speakers, with about 920 million.

Holstein dairy cows produce the most milk of any domesticated animal, averaging about 10,000 litres per year.

The Danube flows through or borders 10 countries, more than any other river in the world.

China has been the world's largest gold producer since 2007, mining about 370 tonnes per year.

The 1960 Valdivia earthquake in Chile measured magnitude 9.5.

Jupiter rotates the fastest of all planets in our solar system, completing one rotation in just 9 hours 56 minutes.

A giant freshwater stingray caught in Cambodia in 2022 weighed about 300 kg.

The kangaroo rat can survive its entire life without ever drinking water, obtaining moisture from seeds.

Annapurna in Nepal has the highest fatality rate of any 8,000-meter peak, at about 27%.

The sperm whale produces clicks reaching about 230 decibels underwater.

China is the world's largest energy consumer, using about 157 exajoules per year.

The Brazilian wandering spider (Phoneutria) is considered the most venomous to humans.

Sumerian cuneiform, dating to about 3400 BC, is the oldest known written language.

Hydrogen constitutes about 73 % of the Sun's mass.

Saffron, at up to $10,000 per kilogram, is the most expensive spice.

The Port of Shanghai has been the world's busiest port by cargo volume since 2010.

The sailfish can reach speeds of about 110 km/h in short bursts.

The brain consumes about 20 % of the body's total energy despite being only 2 % of body weight.

Don Juan Pond in Antarctica has a salinity of about 44 %, making it the saltiest body of water.

Singapore consistently ranks as the country with the fastest average internet speed, exceeding 260 Mbps.

The emperor penguin stands up to 122 cm tall and weighs up to 45 kg.

China is the world's largest rice producer, growing about 212 million tonnes annually.

Mount Etna in Sicily holds the longest recorded eruption history, with over 200 documented eruptions since 1500 BCE.

Oxygen makes up about 65 % of the human body by mass.

Japan and Monaco regularly top the list, with life expectancies above 85 years.

The blue whale, reaching up to 30 metres and 180 tonnes, is the largest animal ever.

Bananas are the most consumed fruit globally, with over 100 billion eaten per year.

Giant bamboo (Dendrocalamus giganteus) can reach heights of over 30 metres.

Great Smoky Mountains National Park in the US receives over 12 million visitors per year.

The king cobra is the world's longest venomous snake, reaching about 5.5 metres, with record specimens close to 5.7 metres.

Paedocypris progenetica, a tiny carp from Indonesian peat swamps, can mature at just 7.9 millimetres long.

The goliath frog of Cameroon and Equatorial Guinea is the largest frog, growing up to about 32 centimetres long and 3.3 kilograms.

The golden poison frog of Colombia is the most poisonous frog, carrying enough batrachotoxin to kill about ten adult humans.

Queen Alexandra's birdwing from Papua New Guinea is the largest butterfly, with females reaching a wingspan of up to about 28 centimetres.

The lion's mane jellyfish is the largest, with a bell up to about 2 metres wide and tentacles that can exceed 30 metres.

The giant Pacific octopus is the largest known octopus species, typically weighing around 15 kilograms with an arm span of up to about 4 metres.

The capybara of South America is the largest living rodent, weighing 35 to 66 kilograms and measuring up to about 1.3 metres long.

The moose is the largest deer, with bulls standing up to about 2.1 metres at the shoulder and weighing up to around 700 kilograms.

The rusty-spotted cat of India, Sri Lanka and Nepal is the smallest wild cat, weighing just 0.9 to 1.6 kilograms.

The Great Dane and the Irish Wolfhound are the tallest dog breeds, and Great Danes hold the record for the tallest dog ever measured.

The border collie is widely ranked as the smartest dog breed, topping psychologist Stanley Coren's famous intelligence rankings.

Cuvier's beaked whale holds the mammal diving record, reaching a depth of 2,992 metres and staying underwater for more than three and a half hours.

Wolffia, commonly called watermeal, is the smallest flowering plant, with individual plants less than about a millimetre across.

The raffia palm Raffia regalis has the longest leaves of any plant, reaching up to about 25 metres long.

Pepper X is officially the world's hottest chili pepper, averaging about 2.69 million Scoville Heat Units.

The jackfruit is the largest tree-borne fruit, sometimes weighing more than 40 kilograms and measuring up to about 90 centimetres long.

Red supergiants such as Stephenson 2-18 are among the largest known stars, with estimated radii around 2,000 times that of the Sun, though measurements are uncertain.

Ceres is the largest object in the asteroid belt, about 940 kilometres across, and is classified as a dwarf planet.

Jupiter's moon Io is the most volcanically active body in the solar system, with more than 400 active volcanoes.

Earth is the densest planet in the solar system, with an average density of about 5.51 grams per cubic centimetre.

The Bay of Bengal is the largest bay in the world, covering about 2.17 million square kilometres of the northeastern Indian Ocean.

Salvator Mundi, attributed to Leonardo da Vinci, is the most expensive painting ever sold at auction, fetching $450.3 million in 2017.

Michael Jackson's Thriller is the best-selling album of all time, with estimated worldwide sales of about 70 million copies.

Bing Crosby's 'White Christmas' is the best-selling single of all time, with estimated sales of about 50 million copies.

Japan's L0 Series maglev holds the train speed record of 603 km/h, set on 21 April 2015.

Singapore Airlines' service between Singapore and New York JFK is the longest regular non-stop flight, covering about 15,300 kilometres in roughly 18 to 19 hours.

The supertanker Seawise Giant, completed in 1979, was the longest ship ever built at 458.45 metres.

The Stratolaunch Roc has the largest wingspan of any aircraft ever flown, at about 117 metres.

Malbork Castle in Poland is the world's largest castle by land area, covering about 143,600 square metres.

Kongō Gumi, a Japanese construction firm founded in 578 AD, is widely regarded as the oldest company in the world.

The United States has the most tornadoes of any country, averaging about 1,200 a year.

Yuma, Arizona, is recognised as the sunniest place on Earth, with the sun shining about 90 percent of daylight hours.

Hurricane Patricia in 2015 was the strongest hurricane ever recorded by wind speed, with sustained winds of about 345 km/h.

Talc is the softest mineral, ranking 1 on the Mohs hardness scale.

Osmium is the densest naturally occurring element, at about 22.59 grams per cubic centimetre.

The gluteus maximus, in the buttocks, is the largest muscle in the human body.

John Isner beat Nicolas Mahut at Wimbledon in 2010 in a match lasting 11 hours and 5 minutes, spread over three days.

Kenya's Kelvin Kiptum holds the men's marathon world record of 2:00:35, set in Chicago on 8 October 2023.

Usain Bolt is the fastest man ever recorded, running 100 metres in 9.58 seconds in Berlin in 2009.

The pygmy marmoset of the western Amazon is the smallest monkey, weighing only about 100 to 120 grams.

Kazakhstan is the world's largest landlocked country, covering about 2.72 million square kilometres.

Reykjavík, the capital of Iceland, is the northernmost capital of a sovereign country, at about 64°08′ north.

The superb lyrebird of Australia is often considered the best mimic, copying other birds as well as sounds like chainsaws and camera shutters.

The Barberton Makhonjwa Mountains in South Africa and Eswatini are considered the oldest, with rocks about 3.6 billion years old.

The great bustard is usually considered the heaviest flying bird, with males sometimes weighing around 16 to 18 kilograms.

The black mamba of sub-Saharan Africa is usually considered the fastest snake, reaching about 16 km/h or more in short bursts.

Darwin's bark spider of Madagascar builds the largest known orb webs, with bridge lines up to about 25 metres long across rivers.

The domestic chicken is the most common bird, with tens of billions alive at any time; among wild birds, the house sparrow was estimated in 2021 to be the most abundant.

The leatherback sea turtle is the largest turtle, with shells up to about 1.8 metres long and weights often exceeding 500 kilograms.

Oganesson, element 118 (symbol Og), has the highest atomic number of any element discovered so far.

The Gulf of Mexico is the world's largest gulf, covering about 1.6 million square kilometres.

The Komodo dragon is the world's largest living lizard, reaching up to about 3 metres long and 70 kg or more.

Saudi Arabia is the largest country in the world with no permanent rivers; it relies on groundwater and desalinated seawater instead.

Titan, Saturn's largest moon, is the only moon in the solar system with a thick atmosphere, denser than Earth's.

Algeria is the largest country in Africa, covering about 2.38 million square kilometres.

Brazil is the largest country in South America, covering about 8.5 million square kilometres, nearly half the continent.

Pluto is the largest known dwarf planet by diameter (about 2,377 km), though Eris is slightly more massive.

The aorta is the body's largest artery, carrying oxygen-rich blood from the heart's left ventricle to the rest of the body.

White blood cells, or leukocytes, fight infection by attacking germs, making antibodies and cleaning up damaged cells.

The Latin (Roman) alphabet is the world's most widely used writing system, used for hundreds of languages and by billions of people.

Elephants have the longest pregnancy of any mammal: African elephants carry their calves for about 22 months.

Lungfish have true lungs and can breathe air; some African species survive for years in dried mud.

The strawberry is famous for wearing its 'seeds' on the outside — and each of those tiny specks is actually a separate fruit.

Saturn's moon Enceladus shoots jets of water vapour and ice grains into space from cracks near its south pole.

NASA's Voyager 1 spacecraft, launched in 1977, is the most distant human-made object, now more than 25 billion km from Earth.

Several countries span two continents, including Russia, Turkey, Kazakhstan, Azerbaijan and Georgia (Europe and Asia) and Egypt (Africa and Asia).

Mars has the tallest known volcano: Olympus Mons, which rises about 22 km, roughly two and a half times the height of Mount Everest.

Valles Marineris on Mars is the largest known canyon system in the solar system, about 4,000 km long and up to 7 km deep.

Cuba is the largest island in the Caribbean, covering about 105,000 square kilometres.

Scotland's national animal is the unicorn, a mythical creature that has been a Scottish royal symbol since the Middle Ages.

Denmark's flag, the Dannebrog, is recognised by Guinness World Records as the oldest continuously used national flag.

Canada and the United States share the world's longest international border, about 8,891 km including the Alaska section.

Sicily, part of Italy, is the largest island in the Mediterranean Sea, covering about 25,700 square kilometres.

Saturn is the least dense planet in the solar system, with an average density of about 0.69 g/cm³ — less than water.

Mount Everest is the tallest mountain above sea level, at 8,848.86 meters (29,031.7 feet).

Jupiter is the largest planet in the solar system, with a diameter of about 139,820 kilometers.

The Challenger Deep in the Mariana Trench is the deepest known point in Earth’s oceans, reaching about 10,935 meters.

The femur, or thigh bone, is the longest bone in the human body.

The aorta is the largest blood vessel in the human body.

The common swift is often cited as the fastest bird in level flight, reaching around 111 kilometers per hour.

Humans have the largest brain relative to body size among mammals, with an encephalization quotient far above most other species.

The Pacific Ocean is the largest ocean on Earth, covering about 165 million square kilometers.

Tamil is one of the oldest living written languages still in use, with literary evidence dating back over 2,000 years.

Alexander Graham Bell’s 1876 telephone is widely regarded as the first practical telephone.

The United States has won the most FIFA Women's World Cup titles, with 4 championships.

Hong Kong has the most skyscrapers of any city in the world.

The saltwater crocodile is the largest living reptile, with some males reaching over 6 meters in length.

The Sahara is the largest hot desert on Earth, covering about 9.2 million square kilometers.

Coast redwoods can grow the tallest, with the tallest known living tree, Hyperion, measuring about 116 meters.

Sirius is the brightest star in the night sky as seen from Earth.

The saltwater crocodile has one of the strongest bite forces measured in the animal kingdom, exceeding 16,000 newtons in some studies.

Dung beetles are often cited as the strongest insects relative to body size, able to pull many times their own weight.

Jericho is often considered the oldest continuously inhabited city, with settlements dating back around 11,000 years.

The Arctic tern migrates the farthest annually, traveling roughly 70,000 kilometers or more each year.

The most abundant mineral group in Earth’s crust is the feldspars.

Mount Everest is the tallest mountain above sea level, with a summit elevation of about 8,849 meters. It lies on the border between Nepal and China.

The Lut Desert in Iran has recorded some of the highest land-surface temperatures on Earth, including a satellite-measured 70.7°C. It is often cited as the hottest place on the planet.

Jericho is often cited as the oldest continuously inhabited city in the world. Archaeological evidence shows settlement there going back more than 10,000 years.

The Great Barrier Reef is the largest reef system in the world. It extends for about 2,300 kilometers and contains thousands of individual reefs.

The coast redwood is the tallest tree species in the world. Individual trees can exceed 115 meters in height.

The Nile is traditionally regarded as the longest river system in the world, at about 6,650 kilometers. Some studies argue the Amazon may be slightly longer depending on measurement method.

Graphene is often cited as the strongest known naturally occurring material, with exceptional tensile strength and flexibility. It is a single layer of carbon atoms arranged in a hexagonal lattice.

Olympus Mons on Mars is the largest volcano in the Solar System. It rises about 22 kilometers above the surrounding plains and is roughly 600 kilometers wide.

Tokyo is widely regarded as the largest metropolitan area in the world, with around 37 million people in its urban agglomeration. Different definitions of metro area can shift the exact ranking.

Vatican City is the smallest country in the world by area, at about 0.49 square kilometers. It is also the world’s smallest independent state by population.

Saffron is the most expensive spice by weight in the world. High-quality saffron can cost thousands of dollars per kilogram because it is harvested by hand from crocus flowers.

The whale shark is the largest shark in the world. It can grow to around 12 meters long, and some reports suggest even larger individuals.

Mauna Kea in Hawaii is the tallest mountain by base-to-peak height, rising about 10,210 m (33,500 ft) from its ocean-floor base. Its summit is lower than Everest’s, but most of the mountain is hidden underwater.

The Arctic tern has the longest known annual migration of any animal, traveling roughly 70,000 to 90,000 km each year. It moves between Arctic breeding grounds and Antarctic waters.

Some adult mayflies live for only a few hours to a couple of days, making them among the shortest-lived adult insects. Their adult stage exists mainly to reproduce.

Alexander Graham Bell’s 1876 telephone is usually credited as the first practical telephone. It made real voice communication over wires possible.

Io, a moon of Jupiter, is the most volcanically active body in the Solar System. Tidal heating from Jupiter drives constant eruptions and lava flows.

Vatican City is the smallest country in the world by area, at about 0.49 km². It is an independent city-state entirely within Rome.

Spider silk is often cited as one of the strongest natural materials, especially for its strength-to-weight ratio. It can be tougher than steel by weight, depending on the silk type and measurement.

Jupiter has the shortest day in the Solar System. It rotates once in about 9 hours 56 minutes.

Mount Everest is the highest mountain above sea level. Its summit is about 8,848.86 meters high.

Tokyo is often cited as the world's most populous city, with around 37 million people in its wider metropolitan area.

The Challenger Deep in the Mariana Trench is the deepest known point in Earth’s oceans. It lies at roughly 10,900 to 11,000 meters below sea level.

The brain uses the most energy of any human organ at rest. It typically consumes about 20% of the body’s resting energy despite being only about 2% of body mass.

Nigeria is the most populous country in Africa. Its population is estimated at well over 220 million people.

The Andes are the longest continental mountain range in the world, stretching about 7,000 kilometers along western South America. They are not a single country’s range, but they are the longest on land.

The ocean quahog clam is one of the longest-lived known animals. One individual nicknamed Ming was dated to 507 years old.

Greenland is the largest island in the world. Its area is about 2.16 million square kilometers.

UY Scuti is often cited as one of the largest known stars by radius. Estimates place its radius at roughly 1,700 times that of the Sun, though exact size is uncertain.

Olympus Mons on Mars is the largest known volcano in the Solar System. It rises about 22 kilometers above the surrounding plains and is roughly 600 kilometers wide.

Tokyo is generally regarded as the world’s largest city by population, with its wider metropolitan area home to around 37 million people. Different boundaries can change the ranking, but Tokyo remains the standard answer.

The deepest known point on Earth is Challenger Deep in the Mariana Trench. Its depth is about 10,900 to 11,000 meters below sea level, depending on the measurement.

Kilauea in Hawaii is often described as the world’s most active volcano. It has had frequent eruptions in modern times and has been one of the best-studied volcanoes on the planet.

The Lut Desert in Iran has recorded some of the highest surface temperatures ever measured on Earth. Satellite readings have shown land-surface temperatures above 70°C.

The Arctic tern is famous for the longest migration of any bird. It can travel roughly 70,000 to 90,000 kilometers in a year between the Arctic and Antarctic regions.

Among animals, the sperm whale is one of the best-known examples of a very large brain, but humans have the largest brain relative to body size among the commonly cited mammals. Relative brain size is usually measured by brain-to-body ratio or encephalization quotient.

Feldspar is the most common mineral group in Earth’s crust. It makes up about 60% of the crust by mineral content.

Diamond is the hardest naturally occurring substance on the Mohs scale. It scores a 10, the highest possible rating.

Jericho is often cited as the oldest continuously inhabited city in the world. Archaeological evidence shows settlement there dating back around 10,000 years.

The saltwater crocodile is generally considered to have the strongest bite force among living animals. Its bite has been measured at over 3,500 pounds per square inch in some studies.

The sailfish is often cited as the fastest fish in the ocean. It has been recorded at speeds of around 110 km/h, though estimates vary.

The Rüppell’s griffon vulture has been recorded at the highest confirmed bird flight altitude. It was documented flying at about 11,300 meters above sea level.

Among known animals, certain millipedes have the most legs. The record-holder, Eumillipes persephone, has more than 1,300 legs.

Sweden is usually listed as the country with the most islands, with about 267,000. Most of them are small and uninhabited.

Mercury has the shortest year in the solar system. It takes just 88 Earth days to orbit the Sun once.

Flutes are among the oldest known musical instruments. Bone flutes found in Europe are around 40,000 years old.

The United States is the world’s largest oil producer. In recent years, it has produced around 13 million barrels per day.

Mars has the largest volcano in the solar system: Olympus Mons. It rises about 22 km above the surrounding plains and spans roughly 600 km across.

Jericho is often cited as the oldest continuously inhabited city in the world. Archaeological evidence shows settlement there dating back to around 9,000 BCE or earlier.

Coast redwoods are the tallest tree species on Earth. The tallest known living redwood, Hyperion, is about 116 meters tall.

A honey fungus colony in Oregon is often cited as the largest living organism on Earth. The Armillaria ostoyae colony covers about 965 hectares, or 9.65 square kilometers.

Argentinosaurus is often regarded as one of the largest dinosaurs ever discovered. Estimates suggest it may have reached around 30 to 35 meters long and weighed roughly 50 to 80 tonnes.

The 1960 Valdivia earthquake in Chile was the strongest ever recorded, with a magnitude of 9.5.

Jupiter is the largest planet by volume in the Solar System. It is more than 1,300 Earths in volume.

Oxygen is the most abundant element in Earth’s crust. It makes up about 46% of the crust by mass.

Venus is the brightest planet in the night sky as seen from Earth. Its reflective clouds make it the most brilliant planet visible to the naked eye.

Russia is the largest country by area. It covers about 17.1 million square kilometers.

The 1960 Valdivia earthquake in Chile is the strongest earthquake ever recorded. It had a magnitude of 9.5.

UY Scuti is one of the largest known stars by radius, often estimated at about 1,700 times the Sun’s radius. Its exact size is uncertain because stellar measurements at that scale are difficult.

The kakadu plum has one of the highest vitamin C contents of any fruit, far higher than oranges. It is a small Australian native fruit used in traditional food and modern nutrition products.

Ojos del Salado, on the Argentina–Chile border, is the tallest volcano above sea level at about 6,893 m (22,615 ft).

La Paz, Bolivia, is the highest national capital, sitting at roughly 3,650 m (11,975 ft) above sea level.

The liver is the largest internal organ in the human body, weighing about 1.3 to 1.5 kg in adults.

The human egg cell, or ovum, is the largest cell by volume and is about 100 micrometers across.

The whale shark is the largest living shark species, reaching about 18 m (59 ft) in length.

The goliath beetles are among the heaviest insects, with large adults reaching around 80 to 100 grams.

Coast redwood is the tallest tree species, with the tallest known living tree reaching over 116 m (380 ft).

The blue whale is the largest living animal by mass, reaching about 180 metric tons or more.

Ganymede, a moon of Jupiter, is the largest moon in the Solar System, with a diameter of about 5,268 km.

UY Scuti is one of the largest known stars by radius, with an estimated size around 1,700 times the Sun’s radius.

Prague Castle is generally regarded as the largest ancient castle complex in the world, covering about 70,000 square meters.

Tokyo is often cited as the world’s most populous metropolitan area, with around 37 million people in the greater urban region.

Diamond is the hardest naturally occurring material on the Mohs scale, with a hardness of 10.

Kīlauea in Hawaii is one of the most active volcanoes on Earth, with eruptions recorded for much of modern history.

The Louvre Museum in Paris is among the largest museums in the world, with more than 35,000 works displayed across about 72,000 square meters of exhibition space.

Alexander Graham Bell’s 1876 telephone is usually regarded as the first practical telephone.

The United States produces the most nuclear electricity, generating about 775 terawatt-hours in a recent year.

The Andes are the longest continental mountain range in the world, stretching about 7,000 km along western South America.

The Sargasso Sea is unique because it has no coastlines; it is bounded by ocean currents in the North Atlantic.

Jericho is often cited as the oldest continuously inhabited city, with settlement history going back more than 10,000 years.

Earth is the densest planet in the Solar System, with an average density of about 5.51 g/cm³.

The Pacific Ocean is the deepest ocean on Earth, and it contains the Mariana Trench.

Canada has the longest coastline in the world, with about 202,080 km of coastline.

The Amazon River has the largest drainage basin in the world, covering about 7 million square kilometers.

The saltwater crocodile is widely regarded as having the strongest bite force of any living animal, measured at over 16,000 newtons in recorded tests.

Mercury has the fastest orbit around the Sun, completing a year in just 88 Earth days.

A honey fungus in Oregon is often cited as the largest known organism, spreading over about 965 hectares.

Among animals, the tiny bumblebee has one of the largest brains relative to body size, but among mammals the shrew is often cited; the answer depends on which group you mean.

Saffron is generally considered the most expensive spice by weight, often selling for thousands of dollars per kilogram.

The brain uses the most energy, consuming about 20% of the body's energy at rest. Even though it is only about 2% of body mass, it is the body's biggest energy user.

Reykjavík, Iceland, is generally considered the northernmost sovereign capital city in the world. It sits at about 64.15° N latitude.

Nitrogen is the most abundant gas in Earth's atmosphere, making up about 78%. Oxygen is next at about 21%.

Jupiter has the shortest day of all the planets, spinning once in about 9 hours and 56 minutes. Its rapid rotation is much faster than Earth’s 24-hour day.

Greenland is the largest island in the world, covering about 2.16 million square kilometres. Australia is larger, but it is classified as a continent rather than an island.

The femur, or thigh bone, is the longest bone in the human body. In adults it can be roughly 48 cm long on average, depending on height and sex.

Hartsfield-Jackson Atlanta International Airport has often been the busiest airport in the world by passenger traffic. It has handled more than 100 million passengers in strong recovery years.

Among countries and territories with very large populations, Bangladesh is one of the most densely populated sovereign states, with well over 1,000 people per square kilometre. It is far denser than India or China.

The coco de mer produces the largest and heaviest seeds in the plant kingdom. Its seeds can weigh around 15 to 30 kg.

The United States has the largest economy in the world by nominal GDP. Its economy is valued at well over $25 trillion in recent estimates.

The Cuvier’s beaked whale holds the record for the longest known mammal dive. It has been recorded staying underwater for more than 3 hours.

New Zealand was the first self-governing country to grant women the right to vote, in 1893.

Mercury has the most extreme temperature swings among the planets, with scorching daytime highs and freezing nighttime lows.

Tokyo is generally considered the world’s largest city by population within its metropolitan area, but the largest by city proper is often Shanghai or another city depending on boundaries; by municipal population, Tokyo is not usually the top answer. For city proper, Chongqing is commonly cited among the largest.

The liver is the human organ best known for its ability to regenerate after injury or surgical removal.

The Arctic tern has the longest known migration of any animal, traveling roughly 70,000 to 90,000 km each year.

The Kazumura Cave lava tube on Hawaii’s Kilauea is one of the world’s longest known lava tubes, extending more than 65 km.

The Khmer alphabet, used for the Khmer language in Cambodia, is often cited as one of the world’s largest with 74 letters, though counting systems can differ.

The whale shark is the largest living fish species, reaching lengths of about 18 meters or more.

The common swift is often cited as the fastest bird in level flight, with measured speeds around 111 km/h.

Jericho is often considered the oldest continuously inhabited city in the world, with settlement history dating back more than 10,000 years.

Voyager 1 is the farthest human-made object from Earth. It launched in 1977 and is now more than 160 astronomical units away.

Voyager 1 is the longest-operating spacecraft still functioning. It has been operating since 1977.

Io, a moon of Jupiter, is the most volcanically active body in the Solar System. Its surface is covered with hundreds of active volcanoes.

Mercury has the shortest year of any planet in the Solar System, taking about 88 Earth days to orbit the Sun.

Jupiter has the shortest day of any planet, rotating once in about 9 hours and 56 minutes.

Uranus has the most extreme axial tilt of any major planet, at about 98 degrees.

Uranus was the first planet discovered with a telescope, by William Herschel in 1781.

Neptune was the first planet discovered through mathematical prediction. It was observed in 1846 after calculations by Urbain Le Verrier and John Couch Adams.

Saturn has the most prominent and extensive ring system in the Solar System. Its rings are made mostly of ice particles and rock.

Pluto is the largest dwarf planet by volume in the classical list of dwarf planets. It is about 2,377 kilometers across.

Pluto’s moon Charon is unusually large relative to Pluto, with a diameter about half of Pluto’s. The pair is often described as a binary system.

ESA’s Rosetta mission deployed the Philae lander onto comet 67P/Churyumov–Gerasimenko in 2014. It was the first soft landing on a comet nucleus.

JAXA’s Hayabusa mission was the first to return asteroid samples, from Itokawa, in 2010.

The Soviet Luna 16 mission was the first robotic mission to return lunar samples, in 1970.

NASA’s Viking 1 lander was the first successful Mars landing, touching down on 20 July 1976.

Mars has had the most successful soft landings of any planet beyond Earth. Dozens of landers and rovers have touched its surface since the 1970s.

SpaceX’s Starship-Super Heavy is currently the most powerful launch vehicle ever flown. Its first integrated test flight launched in April 2023.

NASA’s Parker Solar Probe holds the record for the fastest human-made object. It has reached speeds of about 635,000 km/h near the Sun.

Voyager 1 and Voyager 2 are the oldest active spacecraft, both launched in 1977. Voyager 1 is slightly older by launch date.

The James Webb Space Telescope has produced the deepest infrared views of the early universe. Its images reveal galaxies from more than 13 billion years ago.

New Horizons visited the Kuiper Belt object Arrokoth in 2019, the most distant world ever explored up close. Arrokoth lies in the Kuiper Belt beyond Pluto.

Mars has the most moons among the inner planets, with two: Phobos and Deimos.

NASA’s Dawn mission is the only spacecraft to orbit two extraterrestrial bodies: Vesta and Ceres.

The Soviet Union launched Sputnik 1, the first artificial satellite, in 1957.

Voyager 1 is the farthest human-made object still operating. It is more than 160 AU from Earth and continues to send back data.

The Hubble Space Telescope helped make some of the first direct detections of light from exoplanets and their atmospheres, but the first widely recognized direct imaging detections came from ground-based telescopes in the early 2000s. The field has since advanced rapidly with Webb and other observatories.

Neptune has the strongest winds, with speeds reaching roughly 2,100 km/h (about 1,300 mph). Those winds are far faster than anything measured on the other planets.

Uranus is the coldest planet in the Solar System, with cloud-top temperatures dropping to about -224°C (-371°F). That is colder than Neptune, even though Neptune is farther from the Sun.

Jupiter has the shortest day of any planet, rotating once in about 9 hours and 56 minutes. Its rapid spin makes it visibly flattened at the poles.

Venus has the longest rotation day of any planet, taking about 243 Earth days to spin once. Its day is even longer than its year.

Uranus has the most extreme axial tilt, at about 98 degrees. In effect, it rotates almost on its side.

Uranus was the first planet discovered using a telescope, identified by William Herschel in 1781. It had been seen before, but mistaken for a star.

Neptune was predicted mathematically before it was seen through a telescope. In 1846, astronomers found it close to the position calculated from Uranus's orbital disturbances.

Earth is the densest planet, with an average density of about 5.51 g/cm³. No other major planet in the Solar System is denser overall.

Mars has the biggest volcano, Olympus Mons, which rises about 22 km above the surrounding plains. It is roughly three times the height of Mount Everest above sea level.

Mars has the largest canyon system, Valles Marineris, stretching about 4,000 km across. In places, it is up to around 7 km deep.

Jupiter has the strongest planetary magnetic field in the Solar System. Its magnetosphere is enormous, extending millions of kilometres into space.

Mercury travels fastest around the Sun, averaging about 47.4 km/s. Its short orbit gives it a year of only 88 Earth days.

Mercury has the most eccentric orbit of the eight major planets. Its path is noticeably more oval than the nearly circular orbits of the outer planets.

Jupiter has the strongest surface gravity among the planets, about 24.8 m/s² at the cloud tops. That is a little more than 2.5 times Earth's gravity.

Jupiter's Great Red Spot is the most famous giant storm system, and it has been observed for at least about 350 years. It is large enough to fit Earth inside it, though it has been shrinking over time.

Saturn has by far the most spectacular and visible ring system from Earth. Its rings are made mainly of water ice and are broad enough to stretch hundreds of thousands of kilometres across.

Saturn has the most complex ring system, with countless ringlets and gaps shaped by gravity. The rings are far from a single solid band.

Mars has the most moons of any inner planet, with 2 known moons: Phobos and Deimos. Earth has 1 and Mercury and Venus have none.

Charon is especially notable because it is unusually large compared with Pluto, but the largest moon overall is Ganymede. Ganymede is bigger than Mercury and has its own magnetic field.

Venus is thought to have the most volcanoes of any planet, with thousands of volcanic features mapped from radar data. It may still be volcanically active today.

Venus has the thickest atmosphere of any planet, with a surface pressure about 92 times that of Earth. Its atmosphere is mostly carbon dioxide, with clouds of sulfuric acid.

Mercury has the greatest relative change in distance from the Sun because of its highly eccentric orbit. Its distance varies much more than the nearly circular paths of most planets.

Mercury has one of the biggest day-night temperature swings in the Solar System, with daytime temperatures near 430°C and nighttime temperatures dropping to about -180°C. Its almost airless surface cannot hold heat.

Neptune has the longest year of any planet, taking about 165 Earth years to orbit the Sun once. That means it has completed only one orbit since it was discovered.

Jupiter has the most known moons among the giant planets, with more than 90 confirmed moons. Saturn has many too, but Jupiter currently leads in confirmed counts.

Uranus has the most extreme seasons because it is tilted by about 98 degrees. Each pole can experience long periods of sunlight or darkness during its 84-year orbit.

The Soviet Mars 3 mission achieved the first soft landing on Mars in 1971. The lander transmitted for only a short time after touchdown.

The largest known spiral galaxy is Malin 1, a giant low-surface-brightness galaxy about 1 billion light-years away. Its disk spans roughly 650,000 light-years across.

The most massive known nearby galaxy is IC 1101, a giant elliptical galaxy at the center of the Abell 2029 cluster. It is often estimated to contain several trillion stars.

The nearest large spiral galaxy to the Milky Way is Andromeda, also known as M31. It is about 2.5 million light-years away.

One of the highest known star-formation rates has been observed in starburst galaxies such as the Cosmic Eyelash, a strongly lensed galaxy forming stars extremely rapidly in the early universe. Its rate is hundreds of solar masses per year, far above the Milky Way’s roughly 1 to 2.

One of the most massive directly measured supermassive black holes is in galaxy Holm 15A, with an estimated mass of tens of billions of suns. Such extreme objects sit at the centers of giant galaxies and grow through mergers and accretion.

One of the brightest radio galaxies known is Cygnus A. It is a powerful active galaxy whose jets and lobes make it a landmark object in radio astronomy.

One of the most massive known galaxy clusters is the Phoenix Cluster, also known as SPT-CLJ2344-4243. It is famous for combining enormous mass with intense cooling and star formation in its central galaxy.

One of the largest mapped filaments is the Hercules–Corona Borealis Great Wall. It is an enormous apparent structure identified from gamma-ray burst clustering, though its full nature remains debated.

The Einstein Cross is seen in the galaxy Q2237+0305, where a foreground galaxy lenses a distant quasar into four images. The foreground galaxy acts like a cosmic magnifying glass.

One of the largest known stars by radius is UY Scuti, though exact rankings change with new measurements. Its radius is commonly estimated at over 1,700 times that of the Sun.

R136a1 is among the most luminous and massive known stars. It shines millions of times brighter than the Sun and is found in the Tarantula Nebula in the Large Magellanic Cloud.

KELT-9b is one of the hottest known exoplanets, with temperatures around 4,000°C on its dayside. It is so hot that metal atoms can exist in its atmosphere as gas.

WASP-17b is one of the puffiest known exoplanets, with a radius larger than Jupiter’s despite having much less mass. It is an extreme hot Jupiter orbiting very close to its star.

Titan, Saturn’s largest moon, has the thickest atmosphere of any moon in the Solar System. Its dense nitrogen-rich air is even thicker at the surface than Earth’s by pressure.

Io, one of Jupiter’s moons, is the most volcanically active world known in the Solar System. Its activity is driven by tidal heating from Jupiter and neighboring moons.

Voyager 2 is one of the longest-operating spacecraft in deep space. Launched in 1977, it is still active and has visited all four outer planets.

The James Webb Space Telescope has produced the deepest and most detailed infrared views of the early universe. Its observations can see galaxies that formed less than a billion years after the Big Bang.

The Very Large Telescope helped capture some of the first direct images of exoplanets, including the planet 2M1207b. Direct imaging is rare because stars are so much brighter than their planets.

Among the largest known black holes, TON 618 is often cited as one of the most massive, with an estimated mass of tens of billions of Suns. A larger mass means a larger event horizon.

Some of the most distant spiral galaxy candidates observed by modern telescopes are from the early universe and are still being refined by new data. A notable recent example is a surprisingly mature spiral structure seen in distant galaxies less than 2 billion years after the Big Bang.

The oldest light we can detect is the cosmic microwave background, released about 380,000 years after the Big Bang. It is the afterglow of the early universe, now cooled to just 2.7 K.

Hydrogen is the most abundant element in the Sun and in most normal stars. It makes up about three quarters of the Sun’s mass.

The TRAPPIST-1 system is famous for its chain of near-resonant planets packed into a tiny space. Seven Earth-sized planets orbit an ultracool dwarf star.

PSR J1748−2446ad is the fastest known spinning pulsar, rotating about 716 times per second. That is roughly 43,000 revolutions per minute.

51 Pegasi b was the first exoplanet found orbiting a Sun-like star, announced in 1995. It changed astronomy by proving planets are common beyond the Solar System.

The strong nuclear force is the strongest of the four fundamental forces. It binds quarks into protons and neutrons and holds atomic nuclei together.

Gravity has the longest range of the four fundamental forces. It acts over infinite distance, although it is the weakest force by far.

The weak nuclear force is responsible for many kinds of radioactive decay, including beta decay. It changes one type of subatomic particle into another.

The electromagnetic force makes a compass work. A compass needle aligns with Earth’s magnetic field, which is an electromagnetic phenomenon.

The strong nuclear force holds protons and neutrons together inside atomic nuclei. It overcomes the electric repulsion between protons at very short distances.

Gravity is far weaker than electromagnetism, but it dominates large-scale structure because it is always attractive and acts over unlimited distance.

The electromagnetic force was unified from electricity and magnetism by James Clerk Maxwell in the 1800s. Maxwell’s equations showed they are two parts of the same force.

The weak nuclear force is mediated by the W and Z bosons. These particles were discovered in 1983 at CERN.

The electromagnetic force is carried by photons. Photons are massless, which is why electromagnetism has an effectively unlimited range.

The strong force dominates inside a proton. It binds quarks together through gluons.

At subnuclear distances, the strong force is the strongest known interaction. It overwhelms the other three fundamental forces inside atomic nuclei.

The weak nuclear force is essential to the first step of the Sun’s fusion chain. It allows a proton to change into a neutron during fusion.

The electromagnetic force explains attraction between opposite charges. It is the force behind electric and chemical interactions.

The weak force changes quark flavor in beta decay. For example, a down quark can turn into an up quark.

The electromagnetic force is behind Earth’s magnetic field. It is generated by moving electric charges in the liquid outer core.

Neutrinos interact primarily through the weak force. They almost never interact with matter because the weak force is so short-ranged.

The strong nuclear force is mostly absent from everyday chemistry because it acts only inside atomic nuclei. Chemistry is governed mainly by the electromagnetic force.

Gravity is the force most important in black hole formation. When enough mass collapses into a small enough space, gravity overwhelms every other effect.

The electromagnetic force determines atomic structure. It binds electrons to nuclei and shapes chemistry.

Gravity plays the smallest role in the behavior of everyday small objects compared with electromagnetism. It becomes noticeable only when masses are large.

Gravity is generally considered the hardest fundamental force to unify with the others. Physicists still lack a complete quantum theory of gravity.

The electromagnetic force governs light, and in empty space light travels in straight lines unless spacetime itself is curved. Photons are the carriers of electromagnetic radiation.