Sure, but your average 50-year-old already had their children. They have passed on their genetics, good or bad. No evolutionary pressure.
The life-span extension experiments I have read about specifically only allowed older adult insects to reproduce, pushing that age later and later. Adults that died early did not reproduce. Massive evolutionary pressure.
The life-span extension experiments I have read about specifically only allowed older adult insects to reproduce, pushing that age later and later. Adults that died early did not reproduce. Massive evolutionary pressure.