A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Today's top fuel dragsters take off with more force than the space shuttle.
120
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
More than 20 million meteoroids enter Earth's atmosphere every day.
139
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
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
41% of the moon is not visible from earth at any time.
103