Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Yawns are more contagious among people with closer relationships.
163
The human sigh acts as a physiological reset button.
23
Research has determined that most people are happiest at 7:26pm on a Saturday night.
69
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
By weight, Bone is five times stronger than steel.
417
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13