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A comment on Why did we wait so long for the bicycle?. Parent comment

Re:Why did we wait so long for the bicycle? by gregmac on Monday July 15, 2019 @05:44PM (#20445574)
This threw me on a bit of a tangent to learn about iron and steel, and I came across this good video about the history of the two including the Bessemer Converter: https://www.youtube.com/watch?v=7E__zqy6xcw
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