Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
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 adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The smallest human penis ever recorded was just 5/8 of an inch long!
77
An average adult produces about half a liter of flatulent gas per day, resulting in an average of about fourteen occurrences of flatulence a day.
8
By weight, Bone is five times stronger than steel.
417
If you unfolded your brain, it would cover an ironing board.
42