Enamel is hardest substance in the human body.
61
Your thumb is about the same size as your nose.
124
The average person's skin weighs twice as much as their brain.
131
Chewing gum boosts your brain power.
285
The human body contains over a billion miles of DNA.
147
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55