20 years of serial mouse cloning fails in 58th generation

I was so very confused by the title, thinking they were talking about computer mice

Title: Limitations of serial cloning in mammals

From a month ago -

Reuters Mouse study shows repeated cloning causes grave genetic mutations (6 points) https://news.ycombinator.com/item?id=47510677

Nature Can a mouse be cloned indefinitely? (6 points) https://news.ycombinator.com/item?id=47515624