All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The light hitting the earth right now is 30 thousand years old.
163
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18