In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Most dust particles in your house are made from dead skin!
67
Sound travels about 4 times faster in water than in air.
408
No matter how cold it gets, gasoline will not freeze.
107
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118