Axolotl: Forever Young

With lidless, beady eyes, pale pink skin, feathery gills branching from its neck like soft coral, and a seemingly fixed, disconcertingly human-like smile, the axolotl looks more like an alien than your typical salamander. Unsurprisingly, this strange Mexican amphibian has intrigued and fascinated people for centuries, from the ancient Aztecs to modern-day scientists.