Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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The human body contains over a billion miles of DNA.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
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.
21
A person will create enough saliva to fill two average size swimming pools during his lifetime.
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Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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