The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The human sigh acts as a physiological reset button.
23
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
It is possible to go blind from smoking too heavily.
50
Pain travels through the body at 350 feet per second!
23
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193