385K views · 16K reactions | Here’s marsupial specialist Ross with female koala  Stacy sharing some facts about koalas on this Save the Koala Day. | San Francisco Zoo | Facebook

The quokka, a small marsupial native to Australia, is often called the “happiest animal in the world” due to its adorable smile-like facial expression. Found mainly on Rottnest Island, these herbivores are known for their friendly and curious nature, often approaching humans without fear. Their cheerful appearance, combined with their playful behavior, has made them a favorite for tourists and photographers alike. While their “smile” is simply the natural shape of their mouth, it has earned them