1) What is the context of this discovery? To answ​‌‍‍‍‌‍‍‍‌‍‍‍‌‌‌‌‌‌‍‍​er this, see the “Methods” section: Provide the locations, age, rock unit (name and description), and past environment (if available). Remember it’s OK (for THIS assignment) to cite other authors without reading their entire articles. 

2) How did the Rothschild and DePalma (2013) hypothesize that the tooth marks in the Edmontosaurus fossils indicates predation? Compare this hypothesis to the tooth marks discovered on a previous specimen of Psittacosaurus (Lingham-Soliar 2008): why was the cause of these tooth marks in Psittacosaurus (predation or scavenging) inco​‌‍‍‍‌‍‍‍‌‍‍‍‌‌‌‌‌‌‍‍​nclusive?

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