Your tongue is the only muscle in your body that is attached at only one end.
173
On average, women have always lived longer than men.
195
There's 100 trillion good bacteria living in your body.
17
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
We blink 25 times a minute.
51
Unlike dogs, pigs, and some other mammals, humans cannot taste water. They taste only the chemicals and impurities in the water.
95
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16