if there are any grammar mistakes Paleontologists have proposed that one of the most common North Slope dinosaurs survived the winter by migrating south to more hospitable regions,and there are several arguments support the migration hypothesis.However the professor has different viewpoints. First, although the article claims the edmontosaur's diet supports the migration hypothesis, the professor says the edmontosaur don't need to find food, because it's warmer than now and it's 24 hour for the sunshine.It's good for plants to grow so there's lots of vegetation around.Even winter they can eat nutrient dead vegetation. Second, the speaker refutes the reading by mention edmontosaur live in herds. Though the article states many mordern-day migratory animals live in herds and this supports the migration hypothesis, she argues that edmontosaur live in herds for many reasons,for instance extra protection from predators.And also some animals live in herds but they don't migrate. Third,while the article indicate speeds of the edmontosaur could have easily to move to warmer climate region, the speaker points out that not yet adult edmontosaur could slow down the group because they need adults to take care of so they can't reach the worm region during the harsh arctic winters.