Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A tiny creature ...

With a silly smile and frilly gills, the axolotl has wriggled its way into the hearts of millions, becoming a popular aquarium pet and pop culture icon in video games, children’s books and toy stores.

Yo, let’s talk about the axolotl, the coolest little water monster you’ve ever laid eyes on. This funky creature, with its perma-smile and frilly gills, is straight-up stealing hearts as the ultimate ...

(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 regeneration. Aquatic salamanders ...