Enamel is hardest substance in the human body.
61
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
Tigers can see 6 times better at night than humans.
305
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
The average sperm cell swims at 8 inches per hour.
4
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The world's shortest man measures only 21.5 inches.
73
Your fingernails grow faster in summer.
744