/u/Plethorian's posts
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How do you test (measure accuracy of manufacture) a sphere? Say a ball bearing, or even a marble. Is there an automated system for this process?
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Have there been any substantial changes to the moon since we've had telescopes and photography to check things? Are there any comparison pictures of new craters or such?
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How much of a 3cm diameter steel bar, 2 meter long (a typical pinch bar) would remain if it were thrown straight down from space?
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[WP] You are a farmer in rural America. You find a band of gypsies in your side field - the one closest to town.
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Did societal differences, such as smoking and length of pollution exposure, account for the deaths by age curve in China being very different than in the US? Do we have enough data to examine this?
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