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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The human brain uses approximately as much energy as a 10 watt light bulb.
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The largest cell in the human body is the female egg and the smallest is the male sperm.
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We share 70% of our DNA with a slug.
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We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
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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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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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