He's the two-toed sloth you can actually get pretty close to on a behind the scenes tour. "The tours come in the kitchen. We kind of explain what the diet is made of," explains Shannon Santangelo.

A new study suggests that Mylodon -- a ground sloth that lived in South America until about 10,000 to 12,000 years ago -- was not a strict vegetarian like all of its living relatives. Based on a ...