Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
The bark of an older redwood tree is fireproof.
65
One third of the electricity produced on earth is used to power electric light bulbs!
75
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 left ear is more responsive to words of love and emotion whispered into it than the right.
40
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Indoor pollution is 10 times more toxic than outdoor pollution.
62