Only humans shed emotional tears.
331
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Mushrooms are more closely related to humans than they are to plants.
47
Every human spent about half an hour as a single cell.
144
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Yawns are more contagious among people with closer relationships.
163