4.5 pounds of sunlight strike the Earth each day.
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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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The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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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 third of the electricity produced on earth is used to power electric light bulbs!
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
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