Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Babies crawl an average of 200m a day.
212
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The human eye blinks an average of 4,200,000 times a year.
233
The human brain doesn't stop developing until about 25 years old.
102