Axoloti
Axoloti's are critically endangered amphibians which originate from Lake Xochimilco and Lake Chalco in central Mexico. They are popular exotic pets that reach sexual maturity without going through metamorphosis. Their average lifespan is 15 years however, due to urbanization in Mexico city and consequent water pollution their numbers have been dwindling. They are reasearched extensively in laboratories due to their abilities to perfectly, and endlessly regenerate limbs, spinal cords, jaws, tails and skin without scar tissue. These tissues are also 1000x more resistant to Cancer.
Newt
Newts alternate between aquatic and terrestrial habitats over the year, sometimes even staying in water full-time. They are also threatened by habitat loss, fragmentation, and pollution. Several species are endangered and at least one species, the Yunnan lake newt, has gone extinct recently. Newts produce toxins in their skin secretions as a defense mechanism against predators.
Is it Magic?
No, after amputation, the epidermis or top layer of the skin begins to form over the wound to protect it from infection. Blastema (a mass of regenerative cells) form and begins to generate motor neurons, muscle, and blood vessels along with the regenerated limb. Urodele Amphibians like Salamanders and Newts have the highest regenerative ability among tetrapods.
References
https://en.wikipedia.org/wiki/Newt#As_pets
https://en.wikipedia.org/wiki/Regeneration_%28biology%29#Amphibians
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