It takes about 20 seconds for a red blood cell to circle the whole body.
102
The average person's skin weighs twice as much as their brain.
131
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Enamel is hardest substance in the human body.
61
Chewing gum boosts your brain power.
285
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Every year your body replaces 98% of your atoms.
119