Your heart rate can rise as much as 30% during a yawn.
69
There's 100 trillion good bacteria living in your body.
17
Panophobia is the fear of everything.
52
It takes 17 muscles to smile, 43 to frown.
65
Your body is creating and killing about 2.4 million red blood cells per second.
17
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
On average, women have always lived longer than men.
195
The human sigh acts as a physiological reset button.
23