The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Billions of neutrinos pass unnoticed through your body every second.
6
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
No matter how cold it gets, gasoline will not freeze.
107
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155