Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Enamel is hardest substance in the human body.
61
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
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127