Within three days of death, the enzymes that once digested your food begin to eat you.
22
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.
22
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human sigh acts as a physiological reset button.
23
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92