RBS recommended this fascinating article: Six Months in the Middle Ages: Surviving the Moscow Winter [1]
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F.J. suggested this: Vintage Machinery Website [2]
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H.L. liked this one: What to do when your Dominant Eye Differs from your Dominant Hand [3]
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The 1911 Pistol Is Its Own Toolbox! [4] (Thanks to K.T. for the link.)