Happiest and Cutest Animal in the World! This episode of 5 Weird Animal Facts, your host, Jason Miller talks about Happiest and Cutest Animal in the World! Learn facts about the Quokka, Greater Bilby, Water Opossum, Greater Glider and Marsupial Mole. Learn why the Quokka is known as the happiest and cutest animal in the world. See why taking Quokkas are the world’s most expensive selfie. What is the difference between a sugar glider and a Greater Glider? What the heck is a marsupial mole? Learn some amazing weird facts about these crazy marsupials. Let us know in the comment below which was your favorite.