Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
One human hair can support 3 ounces.
191
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
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Only humans shed emotional tears.
331
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89