Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
One third of the electricity produced on earth is used to power electric light bulbs!
75
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18