The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
People who sleep late have more mental stamina and can outperform early risers.
33
Male hospital patients fall out of bed twice as often as female hospital patients.
71
The average sperm cell swims at 8 inches per hour.
76
35,000 people in the U.S. will die from the flu annually.
6
At age 70, more than 70 percent of men are still potent!
29