It takes about 20 seconds for a red blood cell to circle the whole body.
102
The average person's skin weighs twice as much as their brain.
131
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
If your DNA was stretched out it would reach to the moon 6,000 times.
256
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
The human brain doesn't stop developing until about 25 years old.
102
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193