One of the most popular animals around is the sloth. They are so relaxed and laid back, and they always look like they're smiling. They're also very slow, which makes getting anywhere a long process.

Here are five animals that have turned inactivity into an evolutionary flex.

Shelby A. Ryan receives a Vice-Chancellor’s PhD Training Priority Scheme Scholarship from the University of Newcastle. Her PhD project receives funding from WWF-Australia and Taronga Conservation ...

Sloths, the world's slowest mammals, have evolved over 64 million years into a species that thrives throughout Central America and northern South America, but climate change and human sprawl could be ...

While humans wouldn’t be very happy to find that organisms were growing on their skin, particularly fungi, algae, and insects, it works out pretty well for sloths. Sloths may be hosting entire ...

Humans are encroaching into the habitat of sloths. The solution? A city, built to cater to the lovable, slow-motion creatures. Sloths don't seem to fit the frenzy of urban life. They move a little ...