Enamel is hardest substance in the human body.
61
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The human brain doesn't stop developing until about 25 years old.
102
Your heart will pump about 212 million liters in its lifetime.
26
Yawns are more contagious among people with closer relationships.
163
Chewing gum boosts your brain power.
285
One human hair can support 3 ounces.
191
If your DNA was stretched out it would reach to the moon 6,000 times.
256