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
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Bearing a male child can alter a woman's brain by leaving male DNA that can persist for the rest of her life, making her less likely to suffer from Alzheimer's disease, promote tissue repair, and improve her immune system.
16
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
Research indicates that babies who suck on pacifiers are more prone to ear aches.
21