Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Only humans shed emotional tears.
331
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average sperm cell swims at 8 inches per hour.
4
Gorillas can catch human colds and other illnesses.
205
Poor eyesight (myopia) is associated with higher IQ.
232
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23