Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102
Every year your body replaces 98% of your atoms.
119
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55