Re:Why They Lost The Wheel (1973)
by hga on Saturday February 28, 2015 @11:59AM
(#9124224)
Jerry Pournelle frequently comments that the invention of the horse collar (https://en.wikipedia.org/wiki/Horse_collar) was one of the most consequential ones in history. Here we have a similar move from oxen to something more efficient.
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That reminds me that Egyptians and Romans rode in chariots rather than on horseback because they didn't have stirrups:
http://en.wikipedia.org/wiki/Stirrup