All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The light hitting the earth right now is 30 thousand years old.
163
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Jupiter is bigger than all the other planets combined.
254
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The population of the Earth has more than doubled since 1950.
151