Fans of the movie franchise Zootopia know that sloths make the perfect DMV (Department of Mammal Vehicles) workers.

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.

They just like to take it all in. When it comes to physical activity, few animals have as maligned a reputation as the sloth. The six sloth species, which call Brazil and Panama home, move with no ...