Nearly 50% of the world's scientists are assigned to military projects.
71
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One cubic foot of gold weighs more than 1,200 pounds!
78
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Most dust particles in your house come from dead skin.
48