Hand2: positional code that allows axolotls to regrow limbs found

Axolotls seem to pause their biological clocks and stop ageing

Recent research identifies the proteins that kickstart limb formation in embryos. Just 3 gene-transcription factor proteins in mice were enough to convert certain non-limb-forming stem cells into limb-forming versions. The findings are a next step in regenerative medicine, to grow or regrow limbs.

Axolotls: The adorable, giant salamanders of Mexico