MADISON, Wis., July 20 (UPI) --Sloths are one of only a few mammal types to carve out an exclusively arboreal niche. And new research suggests it's the sloth's tree-based lifestyle that explains its ...

MADISON, Wis. -- Although most of the terrestrial world is covered in trees, there are precious few vertebrates that make the canopy their home and subsist solely on a diet of leaves. Tree sloths are ...

While the majority of animals (humans included) roam the Earth, some of nature’s most fascinating creatures spend their lives ...

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.

Slow-moving and sleepy, sloths live high in rainforest canopies, rarely descending to the forest floor. Bright-eyed and sticky-footed, these frogs cling to leaves and hunt insects in humid rainforests ...