The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
The average sperm cell swims at 8 inches per hour.
76
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
One human hair can support 3 ounces.
191
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Within three days of death, the enzymes that once digested your food begin to eat you.
22
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59