Human teeth are almost as hard as rocks!
47
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Gin is a mild diuretic which helps the body get rid of excessive fluid. Thus, it can reduce problems such as menstrual bloating.
90
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25
Pain occurs when sounds are above 130 db.
123