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
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
Research indicates that babies who suck on pacifiers are more prone to ear aches.
21
The tongue is the strongest muscle in the human body.
50
Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22