Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The population of the Earth has more than doubled since 1950.
151
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
A comet's tail always points away from the sun.
2
In outer space there exists a gigantic cloud of alcohol which can be used to produce 400 trillion trillion pints of beer.
31