The Lost Worlds of Planet Earth Ortelius hypothesized the idea that land masses may have been connected in the past, Alfred Wegener who hypothesized the idea of a super-continent Pangaea and continental drift despite the prevailing idea of flooded land-bridges at the time, and Bruce C. Heezen and Marie Tharp who discovered the Mid-Atlantic Ridge that supported the theory of plate tectonics. Tyson describes how the landmasses of the earth lay atop the mantle, which moves due to the motion and heat of the earth's outer and inner core. Tyson moves on to explain the asteroid impact that initiated the Cretaceous–Paleogene extinction event, leaving small mammals
The Legend That Was Earth a more accurate knowledge of science. Many humans accept this alien presence, but there are many who do not trust the Hyadeans and believe they are plotting to take control of Earth. One group that espouses this belief is CounterAction, which the American government lists as a terrorist organization. When a flyer (advanced aircraft) carrying both Hyadean visitors and Terran politicians is shot down, CounterAction is blamed and the Internal Security Service (ISS) is intent on shutting down their organization by any methods necessary. The action follows savvy Roland Cade who gives up his comfortable life when he is pulled