There's 100 trillion good bacteria living in your body.
17
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The human sigh acts as a physiological reset button.
23
You see your nose at all times, your brain just chooses to ignore it.
30
The average sperm cell swims at 8 inches per hour.
76
Held in farts enter your bloodstream and are bad for your body.
26
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22