When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Our Right Lungs takes more air than our left lung.
194
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
On average, there's 100 billion neurons in the human brain.
83
Gorillas can catch human colds and other illnesses.
205
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14