1867, American Joseph Glidden obtained a patent for the invention of barbed wire. Speaking of it, this invention is the result of laziness, which is related to Joseph's experience as a shepherd boy on a ranch in California. At that time, Joseph often read books while herding sheep; When he was buried in his studies, animals often knocked over the grazing fence surrounded by wooden stakes and wire, and ran to the nearby fields in droves to steal crops. The rancher was very angry and threatened to fire him.
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