Your thumb is about the same size as your nose.
124
Enamel is hardest substance in the human body.
61
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
The human brain doesn't stop developing until about 25 years old.
102
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Chewing gum boosts your brain power.
285
The average sperm cell swims at 8 inches per hour.
76
The average person's skin weighs twice as much as their brain.
131