You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
199
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The average person's skin weighs twice as much as their brain.
131
Within three days of death, the enzymes that once digested your food begin to eat you.
22
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
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