Fans of the movie franchise Zootopia know that sloths make the perfect DMV (Department of Mammal Vehicles) workers. Incredibly slow-moving and methodical, Flash Slothmore and the rest of his ...

Ancient sloths ranged in size from tiny climbers to ground-dwelling giants. Now, researchers report this body size diversity was largely shaped by sloths’ habitats, and that these animals’ precipitous ...

Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are primarily what drove the wide difference in size between sloth species.