The human brain is more active during sleep than during the day.
28
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
We share 70% of our DNA with a slug.
218
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
On average, there's 100 billion neurons in the human brain.
83
Every human spent about half an hour as a single cell.
144