Axolotl
Only a small number of lakes and canals near Mexico City are home to this amazing amphibian. Due to habitat loss, the wild axolotl population, which once numbered in the thousands and provided an important food source for the Aztecs, is believed to have dwindled to just a few individuals. Axolotls can grow to be 18 inches long and have a distinct set of external gills and the ability to regrow lost limbs completely.
Naked Mole Rat
Naked mole rats can be seen all over East Africa, burrowing into the dry grasslands of Ethiopia, Somalia, and Kenya. Scientists have been perplexed by the naked mole-rat for decades due to a variety of unusual biological characteristics. Naked mole rats live unusually long lives for rodents, with some living to be 32 years old. They’re also cancer-resistant and can survive for hours on end in an environment with only a trace amount of oxygen.