 In 2000, a skeleton of "Thescelosaurus", now on display at the North Carolina Museum of Natural Sciences, was described as including the remnants of a four-chambered heart and an aorta.The authors interpreted the structure of the heart as indicating an elevated metabolic rate for "Thescelosaurus", not reptilian cold-bloodedness.Their conclusions have been disputed; other researchers published a paper where they assert that the heart is really a concretion of entirely mineral "cement".