There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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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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Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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