It takes about 20 seconds for a red blood cell to circle the whole body.
102
Ingrown toenails are hereditary.
15
Pain travels through your body at 350 ft. per second.
36
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
You can alleviate a tickly throat by scratching your ear.
9
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
Flu shots only work about 70% of the time.
18