Mars had an oxygen-rich atmosphere around 4 billion years ago
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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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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The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
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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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NASA invented baby food as we know it today.
7