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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The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In zero gravity, a candle's flame is round and blue.
16
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
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