Only humans shed emotional tears.
331
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
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes about 20 seconds for a red blood cell to circle the whole body.
102