Salamander ancestors could regenerate limbs

Ancient amphibian fossils show sign of appendage replacement mechanism

axolotl salamander

GROWTH STRATEGY  Salamanders like this axolotl are among the few four-legged animals that can regenerate body parts.

aureapterus/iStockphoto

Losing a limb or a tail isn’t too worrisome for salamanders. They can regenerate lost appendages. And so could a number of their ancient relatives, a new study finds.