No differences in the DNA sequences for N iterations ... and yet physical and genetic abnormalities eventually appeared after N+1. The suggestion then is that

No differences in the DNA sequences for N iterations ... and yet physical and genetic abnormalities eventually appeared after N+1. The suggestion then is that other information about the iteration of copies of copies is being passed, from the article: There may have been several causes behind the abnormalities that arose in later generations. {various potential causes discussed} If the Popular Mechanics paraphrasing of the original paper is poor, there's always the OG source: Limitations of serial cloning in mammals - https://www.nature.com/articles/s41467-026-69765-7 https://www.nature.com/articles/s41467-026-69765-7