Every year your body replaces 98% of your atoms.
119
When you take a step, you are using up to 200 muscles.
886
The human brain has the capacity to store everything that you experience.
4k
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
The average sperm cell swims at 8 inches per hour.
76