A man's beard grows fastest when he anticipates sex.
239
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
By weight, Bone is five times stronger than steel.
417
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62