Study shakes up sloth family tree

Sloths once roamed the Americas, ranging from tiny, cat-sized animals that lived in trees all the way up to massive ground sloths that may have weighed up to six tons. The only species we know and love today, however, are the two-toed and three-toed sloths–but paleontologists have been arguing how …
Ingeniería
Enlace: Study shakes up sloth family tree