TPO.28

The article states about some evidences toward migration of Edmontosaur dinosaurs from north to south in winter of one hundred million years ago and provides three reasons of support. However the professor in the lecture casts serious doubt on the passage by using a number of points that are contrary to each of the author's reasons.

First of all, the reading claims that there were not enough plants for Edmontosaur dinosaurs and they must have migrated in order to find a better place. In contrast, the professor refutes this point by saying that it is not convincing. He mentions that it is not related to finding food because the weather was warmer than today and we have evidences about peak of sun was so hot in summer than today.

On another hand, the article posits that Edmontosaur dinosaurs have lived in herd and so they migrate all together. However, the teacher describes that living in form of herd does not mean migration. According to the teacher other animals like Rezevo have lived at that time in the US in form of herd without migration.

Finally, the reading makes it clear that Edmontosaur dinosaurs were physically capable of migrating. Conversely, the lecturer opposes this point by explaining that juveniles of this form of dinosaurs have not capable of migration to distant areas. We also learn that juveniles cannot survive on their own.