The olm is also listed as vulnerable on the IUCN’s Red List—the population is threatened by increasing water pollution and tourism, among other problems. This blind, cave-dwelling salamander resides in Europe, primarily in Slovenia and Croatia. Incredibly, they reach reproductive maturity while still in larval form and never transition into an adult form, according to the Zoological Society of London. Studies have shown that even the oldest olms, about 45 to 58 years old, still do not show signs of age-related physical wear, according to National Geographic. Not to mention, they’ve got a number of other superpowers: They can survive without food for up to ten years, they have heightened smell and hearing, and they can even detect electric fields.
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