Permafrost contains microbes, mammoths, and twice as much carbon as the Earth's atmosphere. What happens when it starts to thaw? Published under the title “The Great Thaw” in The New Yorker on January 17, 2022 (Czech translation: Jiří Zemánek); https://www.newyorker.com/magazine/2022/01/17/the-great-siberian-thaw / Joshua Yaffa is a contributor to The New Yorker and the author of “Between Two Fires: Truth, Ambition, and Compromise in Putin's Russia.”…