Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

Many large herbivores that once roamed modern-day Panama have declined or died out—including the 6-meter-long giant ground sloth and elephant-related creatures called Cuvieronius. New research ...

Scroll down for Spanish version, translated by co-author Felipe Franco-Gaviria)Introducing large herbivores in Panama's forests could fill the gap ...

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Long before modern cities and borders, early humans shared the planet with enormous and often dangerous animals. Woolly mammoths, giant ground sloths, saber-toothed cats, and massive cave bears roamed ...