A cesium atom in an atomic clock beats over nine billion times a second.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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4.5 pounds of sunlight strike the Earth each day.
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Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
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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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