It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Gorillas can catch human colds and other illnesses.
205
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Our Right Lungs takes more air than our left lung.
194
The human brain doesn't stop developing until about 25 years old.
102
By weight, Bone is five times stronger than steel.
417
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515