There's nothing stopping us from preserving enough specimens in labs around the world so that we can repopulate. This problem has been studied: https://www.nat

There's nothing stopping us from preserving enough specimens in labs around the world so that we can repopulate. This problem has been studied: https://www.nature.com/news/2010/100721/pdf/466432a.pdf https://www.nature.com/news/2010/100721/pdf/466432a.pdf