It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111