[[人类文明保留计划]]
https://m.toutiaocdn.com/i6671944159718277644/?app=news_article_lite×tamp=1577926469&req_id=202001020854290101290480361D0F7B42&group_id=6671944159718277644&wxshare_count=2&pbid=6777142835833521671&from=groupmessage[[至少要多少人才能延续文明？孤岛效应或正在扼杀人类文明]]
