Out of all the senses, smell is most closely linked to memory.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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Sound travels about 4 times faster in water than in air.
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Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
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 cubic foot of gold weighs more than 1,200 pounds!
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