A small jellyfish has given scientists an unusual look at what it means to reverse biological aging. Turritopsis dohrnii, often called the “immortal jellyfish,” can reverse its life cycle when it is damaged, stressed or facing unfavorable environmental conditions. Instead of continuing toward death, the jellyfish can return to an earlier stage of its development and eventually become a jellyfish again.
A 2024 review published in the Spanish academic outlet Revista Española de Geriatría y Gerontología examined how this process works and what it could teach researchers about regeneration and human aging.
