Your thumb is about the same size as your nose.
124
The human sigh acts as a physiological reset button.
23
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Poor eyesight (myopia) is associated with higher IQ.
232
Yawns are more contagious among people with closer relationships.
163
The human brain uses approximately as much energy as a 10 watt light bulb.
120
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
It takes approximately 12 hours for food to entirely digest.
93