Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
Human hair and fingernails continue to grow after death.
7
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
A man's beard grows fastest when he anticipates sex.
239
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515