Meet the most smiley animal on earth: the quokka. A native of Australia, the quokka is a marsupial in the macropod family (along with wallabies and kangaroos) with a permanently positive outlook ...

The quokka is often referred to as the "happiest animal on earth" because the critters are frequently photographed with what looks like cute little natural grins.

Meet the Adorable Quokka, Known as the 'Happiest Animal on Earth' The quokka, an impossibly-cute marsupial that's taken social media by storm, is facing unexpected threats in its southwestern ...

Until recently, many people outside of Australia had never heard of the quokka, a Muppet-cute (despite its beady eyes and rat's tail) marsupial with an irresistible smile. But this week, people's ...

Biologists have recently discovered that a wallaby's perception of colour is more similar to a dog than a quokka, sparking questions as to why marsupial colour vision has evolved so selectively.