There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The human eye blinks an average of 4,200,000 times a year.
233
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23