Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
34
Enamel is hardest substance in the human body.
61
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Our brains have a negativity bias and will remember bad memories more than good ones.
15