A cesium atom in an atomic clock beats over nine billion times a second.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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For every gallon of sea water, you get more than a quarter pound of salt.
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Pumice is the only rock that floats on water.
14
4.5 pounds of sunlight strike the Earth each day.
27
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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