Can live forever. No kidding, people's life span mainly depends on the length of DNA telomeres in cells. As long as the telomere length can be changed freely, it is possible to delay aging and even live forever.

There are also examples in reality. Cancer cells are telomeres that don't shorten, so cancer cells can proliferate indefinitely. Hella cells used in modern laboratories are taken from black women who died in 195 1 year, and they are still active today.

If we can artificially cultivate cells without canceration and telomere shortening in the laboratory, and then gradually replace the cells in the body, then the aging problem can be completely solved.

Of course, this technology is still in the theoretical stage, and I hope it will become a reality in the future.