Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
One human hair can support 3 ounces.
191
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Enamel is hardest substance in the human body.
61
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Mushrooms are more closely related to humans than they are to plants.
47
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69