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 enough technology to track people down easily. As CounterAction gains more influence, the dystopia worsens. Different cities and states begin to secede from the country, and the Hyadeans take over and start a massive military campaign against them. With smart drones and other impressive weapons, they destroy neighborhoods and areas indiscriminately. Hyadeans who sympathize with CounterAction are given no mercy; the Hyadean West Coast Trade and Cultural Mission, which is host to several Terran sympathizers, is flattened in a bombing raid. Order is restored only when the government in Chryse is dissolved from within. The Legend That Was Earth appears