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This Is Why Some Cactus Spines Are So Hard — and Painful — to Remove - Discover Magazine

This Is Why Some Cactus Spines Are So Hard — and Painful — to Remove. D-brief. By Alison Klesman. Nov 21, 2018 12:00 AM May 21, 2019 5:43 PM. A cholla cactus. (Credit: Focqus/Shutterstock) Newsletter. read more