In Ancient Greece, small penises were desirable, and big ones were for ‘old men and barbarians’
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Within three days of death, the enzymes that once digested your food begin to eat you.
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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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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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Your body is creating and killing about 2.4 million red blood cells per second.
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There's 100 trillion good bacteria living in your body.
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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