Pumice is the only rock that floats on water.
14
Balsa wood is classified as a hard wood!
41
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
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
Nearly 50% of the world's scientists are assigned to military projects.
71
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Scientists aren't sure what color dinosaurs were.
312
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17