Tissue regeneration is the process by which the body repairs or replaces damaged tissues. This remarkable ability allows organisms, like certain species of salamanders, to regrow limbs or organs after injury. In humans, tissue regeneration occurs naturally, such as when skin heals after a cut or when the liver regenerates after partial removal. Scientists study tissue regeneration to develop new medical treatments. By understanding how stem cells work and how tissues communicate, researchers aim to create therapies that can help heal injuries or even replace damaged organs. This field holds great promise for improving health and recovery in the future.