These glow-in-the-dark axolotls can regrow lost limbs — and studying them could eventually help humans do the same.

By Kameryn Griesser, CNN (CNN) — A tiny creature with frilly gills, a polite smile and glowing green skin just gave scientists a major clue to solve one of biology’s biggest mysteries: limb ...

The adorable salamanders are helping scientists investigate a serious question: Could the human body be coaxed to regrow a lost arm or leg?

Using gene-edited, glow-in-the-dark salamanders, the scientists parsed out the important role of a chemical called retinoic acid, a form of vitamin A and also the active ingredient in the acne ...

The implications are massive: By controlling retinoic acid levels, scientists were able to create glow-in-the-dark salamanders with either perfectly formed limbs or comically misshapen ones.