Axolotls possess the terrifyingly impressive ability to flawlessly regenerate missing limbs, completely regrowing their spinal cords, hearts, and even portions of their brains without any permanent scarring.

A closer look

Axolotls possess the terrifyingly impressive ability to flawlessly regenerate missing limbs, completely regrowing their spinal cords, hearts, and even portions of their brains without any permanent scarring. If one of these smiley, aquatic amphibians gets heavily mutilated by a predator, it simply hits a biological reset switch and builds brand new internal organs from scratch in a matter of weeks. Meanwhile, human beings are the supposed apex of planetary evolution, yet we suffer permanent, debilitating back pain if we happen to sleep on a slightly unsupportive mattress. It is deeply unfair that an endangered salamander can survive a literal decapitation attempt while we require expensive dental surgery just because our wisdom teeth decided to grow in sideways