Limb regeneration is the process by which certain organisms can regrow lost body parts. This ability is most famously seen in species like axolotls and starfish, which can regenerate limbs, tails, and even parts of their hearts. Scientists study these creatures to understand the biological mechanisms behind regeneration, which could have implications for human medicine. Research into limb regeneration focuses on understanding the role of stem cells, growth factors, and genetic pathways. By uncovering how these elements work together, researchers hope to develop therapies that could help humans heal from injuries or regenerate damaged tissues, potentially leading to breakthroughs in regenerative medicine.