Where is the world's most precise atomic clock kept?
Quick Answer
Some of the world’s most precise atomic clocks are kept at national metrology labs such as NIST in Boulder, Colorado. These clocks are so accurate they can lose or gain less than a second over billions of years.
The Full Story
One of the best-known places for the world’s most precise atomic clocks is the National Institute of Standards and Technology, or NIST, in Boulder, Colorado. NIST’s laboratory has developed optical atomic clocks that are among the most accurate timekeepers ever built. These instruments are used to define time standards, test relativity, and improve technologies like GPS. Modern atomic clocks can be accurate enough to measure time so precisely that they would only drift by about a second over the age of the universe.
Key Facts
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"The clock that is so precise it can barely lose time over the age of the universe."