Every year your body replaces 98% of your atoms.
119
The average sperm cell swims at 8 inches per hour.
76
Chewing gum boosts your brain power.
285
When you take a step, you are using up to 200 muscles.
886
Yawns are more contagious among people with closer relationships.
163
The average person's skin weighs twice as much as their brain.
131
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118