Enamel is hardest substance in the human body.
61
The human brain has the capacity to store everything that you experience.
4k
The average person's skin weighs twice as much as their brain.
131
Every year your body replaces 98% of your atoms.
119
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515