/u/82364's posts in /r/askscience
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How do we know that rising CO2 levels are causing an increase in global temperatures, not the other way around?
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Could someone please explain how film resolves different levels of detail at different contrast ratios?
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Wikipedia has an unsourced statement that the EELT's angular resolution is to be "0.001 to 0.65 arcseconds depending on instrument." Can anyone elaborate?
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