There's 100 trillion good bacteria living in your body.
17
The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
193
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
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The smallest human penis ever recorded was just 5/8 of an inch long!
77
Lack of water is the #1 trigger of daytime fatigue.
148