After making 1,200 clones over two decades that started off with a single mouse, Japanese scientists have discovered, there is a limit on how many times a mammal can be cloned before suffering "mutational meltdown." https://www.japantimes.co.jp/news/2026/04/15/japan/science-health/mammals-cannot-be-cloned-infinitely/?utm_medium=Social&utm_source=mastodon #japan #sciencehealth #cloning #genetics #mice