The Australian echidna (Tachyglossus aculeatus) is a unique mammal found in Australia and some neighboring islands like Tasmania and New Guinea.

In appearance, the echidna is quite unusual, with its dense, spiky covering resembling quills, serving as protection against predators. They also have a long, sticky tongue that they use to capture ants and termites, their primary food source. Echidnas possess keen senses of smell and hearing, aiding them in locating prey.

One of the most fascinating aspects of Australian echidnas is their longevity. The maximum recorded lifespan of these creatures is around 50 years, which is quite impressive for mammals. Research has shown that the cell membrane structure of echidnas is resistant to peroxidation, which may be one of the reasons for their extended lifespan.