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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The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
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Enamel is hardest substance in the human body.
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Yawns are more contagious among people with closer relationships.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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The human body contains over a billion miles of DNA.
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Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
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In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
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