On average, there's 100 billion neurons in the human brain.
83
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The human eye blinks an average of 4,200,000 times a year.
233
We share 70% of our DNA with a slug.
218
One human hair can support 3 ounces.
191
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Yawns are more contagious among people with closer relationships.
163