Have you ever seen a creature that seems to smile at you from behind the glass, with feathery gills waving like carnival ...

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

A worker shows an axolotl in a hatchery to preserve the species on August 19, 2019 in Mexico City, Mexico. CREDIT: Eyepix/NurPhoto via Getty Images. NurPhoto ...

You might know axolotls from video games like “Minecraft” and “Pokemon,” but the aquatic salamanders with unique, adorable and popular with people who keep amphians as pets.

But wild axolotls, endemic to a single lake in Mexico, are critically endangered due to degradation of their native wetlands, with only 50 to 1,000 individuals left in the wild.

An axolotl, a type of salamander that's become a pop culture phenomenon, is now on display at the Philadelphia Zoo. The creatures are a favorite among kids after they were introduced in the video ...

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

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