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
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The human brain doesn't stop developing until about 25 years old.
102
The human body contains over a billion miles of DNA.
147
Yawns are more contagious among people with closer relationships.
163
The average sperm cell swims at 8 inches per hour.
76