Astronauts get taller when they are in space.
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The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The population of the Earth has more than doubled since 1950.
151
More than 20 million meteoroids enter Earth's atmosphere every day.
139
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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