Summary: The article discusses the concept of "animal regeneration," focusing on the specific case of Planarians. Planarians are flatworms known for their remarkable ability to regenerate entire bodies from just a small piece of their tissue. This impressive feat is made possible by specialized cells called neoblasts, which are stem cells that are essential for tissue regeneration. Recent research has shed light on the mechanisms behind this regeneration process, revealing the importance of signaling pathways and transcription factors that control cell proliferation, differentiation, and tissue remodeling. By studying the regeneration abilities of Planarians, scientists hope to gain insights into the potential for regenerative medicine in humans, as well as the evolutionary significance of regeneration in different species.