The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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41% of the moon is not visible from earth at any time.
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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
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The population of the Earth has more than doubled since 1950.
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