Diamonds can be shattered with a hammer.
-104
Each day, up to 150 species of life become extinct.
-23
Your brain is 80% water.
525
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
In zero gravity, a candle's flame is round and blue.
16
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18