Evolving as displaced isn't self evidence now is where eternal life works each generation gap occupying time this rotation in a body that is a specific ever changing form since rotation of conceived to replace previous generation gaps so far.
Extinction arrives the rotation great great grandchildren aren't added each rotation forward born one at a time even with multiple births in the same pregnancy or cloning.
Cloning a 1,000 babies at the same time is going to add a 1,000 separate lifetimes that have basically the same chromosomes. Not a way to save the species since a lot of incest arrives that way unless the clones are sterile.