The aquatic sloth Thalassocnus is represented by five species that lived along the coast of Peru from the late Miocene through the late Pliocene. A detailed comparison of the cranial and mandibular ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Everybody loves sloths, and whenever we talk ...

When we think of sloths, the first thing that comes to mind is often their slow, deliberate movement through the treetops of the tropical rainforests. However, what many people don’t know is that ...