Scientists Tried to Clone Clones Forever. It Didn’t End Well - Gizmodo

Researchers attempting to create continuous lineages by repeatedly cloning clones found the practice led to progressive reproductive failure and a genetic dead end. The work suggests that making clones from clones accumulates defects or epigenetic changes that eventually prevent viable offspring. This result joins other recent studies — for example, experiments showing tardigrades cannot survive simulated Martian surface conditions — in highlighting biological limits to resilience and reproduction under different stresses.