The adult human brain weighs about 3 pounds (1,300-1,400 g).
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Human hair and fingernails continue to grow after death.
7
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
It is possible for you to survive even after the removal of the spleen, the stomach, one kidney, one lung, 75% of the liver, 80% of the intestines, and almost every organ from the pelvic and groin area.
218
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
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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