/u/[deleted]'s posts in /r/askscience
There's no such thing as a perfect vacuum. But what's the closest to a perfect vacuum in nature? In the least dense part of space, how far apart are two atoms?
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Would it be theoretically possible for Earth to generate a permanent hurricane, similar to the red spot on Jupiter?
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What would stop an AI system with greater-than-human intelligence from being detrimental to humanity?
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During the Carboniferous, O2 levels were 163% modern levels while CO2 was 800ppm. With so many plants, why were CO2 levels so high relative to modern levels?
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