In the average lifetime a person will breath in about 44 pounds of dust.
21
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
More people have a phobia of frogs than rats.
41
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Gardening is said to be one of the best exercises for maintaining healthy bones.
40