Mars had an oxygen-rich atmosphere around 4 billion years ago
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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.
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There are more nerve cells in the human brain than there are stars in the Milky Way.
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Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
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According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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