/u/wataf's posts
How did the vast majority of the world come to use the 24 hour day time measurement system? What were some other timekeeping units that were once popular but were overtaken by the 24 hour clock?
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How big of a telescope would I need to be able to actually see an earth like exoplanet in the visible spectrum? Would it be possible to make for example continents and clouds?
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What would the Earth look like now if life had never formed here? Would there be any major geological differences?
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Throughout history were there other plagues like the black death that affected entire civilizations on such a massive scale?
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