The population of the Earth has more than doubled since 1950.
151
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Astronauts get taller when they are in space.
224
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
The earth travels through space at 660,000 miles per hour.
189
Venus is the only planet that rotates clockwise.
310
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