This salamander can regrow its brain

The axolotl can regrow parts of its brain. This Mexican salamander, critically endangered in the wild, can regenerate limbs, jaw, spinal cord, and even sections of its telencephalon after injury. Unlike mammals that form scar tissue, axolotls activate ependymal stem cells that rebuild neurons with correct connections. A 2024 study mapped how their cells revert to a developmental state then re-differentiate. They do this repeatedly without tumours. Scientists study them for spinal cord repair. While we scar, this smiling amphibian simply rebuilds, offering a living blueprint for regenerative medicine.