Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
Every day, the average person swallows about a quart of mucous.
5
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
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
The lifespan of a tastebud is ten days.
130
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
Human teeth are almost as hard as rocks!
47