Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
The bark of an older redwood tree is fireproof.
65
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
A single speck of dust is half way in size between a subatomic particle and the Earth.
15