Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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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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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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No matter how cold it gets, gasoline will not freeze.
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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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One ragweed plant can release as many as one billion grains of pollen!
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