The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
More than 20 million meteoroids enter Earth's atmosphere every day.
139
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The population of the Earth has more than doubled since 1950.
151
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15