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A surprisingly small population could save our species. A person walking in the Mojave Desert during the post-apocalyptic Wasteland Weekend festival on Sept. 28, 2019. (Image credit: Agustin Paullier/Contributor via Getty Images) From all-out nuclear war to a giant asteroid strike, it s not hard to imagine ways human life on Earth could abruptly end. But assuming there are some survivors, how many people would it take to keep our species going?   The short answer is, it depends. Different catastrophes would create different doomsday conditions for surviving human populations to endure. For example, a nuclear war could trigger a nuclear winter, with survivors facing freezing summer temperatures and global famine, not to mention radiation exposure. However, putting some of these conditions aside and focusing on population size, the minimum number is likely very small compared with the approximately

New yorkUnited statesNew zealandUnited kingdomPortland state universityCameron smithSeth baumProxima centauriUniversity of strasbourgJournal of the british interplanetary societyGlobal catastrophic risk instituteDepartment of anthropology at portland state universitySpanish habsburgKing charlesSeed vaultBritish interplanetary society