The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The human body contains over a billion miles of DNA.
147
Poor eyesight (myopia) is associated with higher IQ.
232
Chewing gum boosts your brain power.
285
Your thumb is about the same size as your nose.
124
Yawns are more contagious among people with closer relationships.
163