Your skin is actually an organ.
88
A sneeze can travel as fast as 100 miles per hour.
43
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Redheads require up to 20% more anesthesia to be knocked out.
112
Although men ARE more likely to suffer heart attacks, women are more likely to die within a year from having a heart attack.
50
The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
15
There are more bacteria in your mouth than there are people in the world.
60