In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Most dust particles in your house come from dead skin.
48
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
In zero gravity, a candle's flame is round and blue.
16
Indoor pollution is 10 times more toxic than outdoor pollution.
62