The adult human brain weighs about 3 pounds (1,300-1,400 g).
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On average, there's 100 billion neurons in the human brain.
83
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
25% of your bones are located in your feet.
12