It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
The average person's skin weighs twice as much as their brain.
131
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
One human hair can support 3 ounces.
191
The average sperm cell swims at 8 inches per hour.
76