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
Your thumb is about the same size as your nose.
124
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29