10 Animals That Can Literally Bring Themselves Back to Life

3. Planarians: The Immortal Worms

Planarians, flatworms found in freshwater environments, possess an almost mythical ability to regenerate. These worms can regrow any part of their body, including their heads and brains, from just a small fragment. This regenerative prowess is attributed to their abundance of pluripotent stem cells, which can develop into any cell type needed for regeneration. Planarians have become a model organism for studying stem cell biology and regeneration, offering insights into cellular differentiation and tissue repair. Understanding how planarians control their stem cells and prevent uncontrolled growth could provide valuable clues for cancer research and regenerative medicine, potentially leading to breakthroughs in treating various human ailments.