One barrel of petroleum holds 42 gallons.
20
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The bark of an older redwood tree is fireproof.
65
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17