Can you see why the quokka is known as the "world's happiest animal?" These cat-sized marsupials, native to Australia, have upturned mouths giving the appearance of a perpetual grin. Quokkas are primarily found on Rottnest Island, where they've become a symbol of conservation due to their vulnerable status. #NatGeoExplorer and #PhotoArk founder JoelSartore documented this quokka (Setonix brachyurus), named Autumn, at the Taronga Zoo in Sydney. Photo Ark uses the power of photography to inspire people to delve into the captivating lives of wildlife, revealing their remarkable behaviors and exploring solutions to safeguard them from growing threats. Explore more at the link in bio. #WorldSmileDay