Biology
Why Axolotls Can Regrow Lost Limbs
Quick fact
An axolotl can regenerate not only limbs but also parts of its heart, brain, and spinal cord, all without forming scar tissue.
Why this is interesting
Imagine losing an arm and growing a new one, complete with bones, muscles, and nerves. Axolotls do this routinely. How do they achieve what is impossible for humans?