A study led by Dr. Kieren Mitchell of the University of Adelaide sheds new light on the evolution of what are believed to be the largest bears that ever lived on Earth. Reconstruction of the giant, short-faced North American bear Arctodus simus. Image credit: Daniel Reed / CC BY-SA 3.0. Giant bears (greater than 800-1,000 kg) roamed both North and South America during the Pleistocene, 2.5 million to 11,000 years ago. These animals belonged to a now...
