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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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Balsa wood is classified as a hard wood!
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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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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According to studies, men change their minds two to three times more often than women.
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One gallon of used motor oil can ruin approximately one million gallons of fresh water!
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