Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...

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.

What do you get when you cross a sloth with a bear? Well, that one's easy: you get a sloth bear, which, while not actually related to true sloths in any way, does share more than a passing resemblance ...