Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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If you are cold you are more likely to be hungry because you use energy to keep warm.
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If your DNA was stretched out it would reach to the moon 6,000 times.
256
There are about 1,400 different species of bacteria in your belly button.
10
There's 100 trillion good bacteria living in your body.
17
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
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