⏰ when
When did life first appear on Earth?
ScienceBiologyEarth
Quick Answer
The earliest known life appeared at least 3.5 billion years ago, in the form of simple single-celled microbes.
The Full Story
Life on Earth is astonishingly old. The oldest widely accepted fossil evidence — microscopic structures and chemical traces left by simple microbes — dates back at least 3.5 billion years, and some evidence hints life may have arisen even earlier. For most of Earth history, life consisted only of single-celled organisms in the oceans. Complex multicellular life, and later animals, appeared much more recently, meaning microbes had the planet almost entirely to themselves for billions of years.
Key Facts
1.The earliest known life is at least 3.5 billion years old
2.It was simple single-celled microbes
3.Complex life appeared far more recently
YouTube Angle
Suggested video title for this topic:
"When Life Began — Earth First Living Things"