There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
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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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It 'snows' metal on Venus.
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