Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
Pain travels through your body at 350 ft. per second.
36
One out of 20 people have an extra rib.
66
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
When your face blushes, the lining of your stomach turns red, too.
154
You inhale about 700,000 of your own skin flakes each day.
29