Astronauts get taller when they are in space.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Lightning strikes about 6,000 times per minute on this planet!
158
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
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
The Earth gets 100 tons heavier every day due to falling space dust.
673