sentences:  However, noting that sloths lack the carnassials typical of predators and that traces of bone are absent from the many preserved deposits of sloth dung, Paul Martin has described this proposal as "fanciful".Carbon isotope analysis has found that "Megatherium" has isotope values similar to other megafaunal herbivores such as mammoths, glyptodonts, and "Macrauchenia", and significantly unlike omnivorous and carnivorous mammals, suggesting that "Megatherium" was an obligate herbivore.In the south, the giant ground sloth flourished until about 10,500 radiocarbon years BP (8,500 BCE).