Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
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It takes twice as long to lose new muscle if you stop working out than it did to gain it.
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We share 70% of our DNA with a slug.
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There are about 255 babies born worldwide every minute.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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By weight, Bone is five times stronger than steel.
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There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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