Earth's landmasses were not always what they are today. Continents
formed as Earth's crustal plates shifted and collided over long periods
of time. This video shows how today's continents are thought to have
evolved over the last 600 million years, and where they'll end up in the
next 100 million years. Paleogeographic Views of Earth's History
provided by Ron Blakey, Professor of Geology, Northern Arizona
University.
