There are about 1,400 different species of bacteria in your belly button.
10
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
There's 100 trillion good bacteria living in your body.
17
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
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The human sigh acts as a physiological reset button.
23
