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 Recall times in the distant past, and have guided the evolution of life on Earth. He's been preparing for their return, and he ambushes some of the aliens. The children all end up being taken to the spaceship where they are among a few thousand humans who are abducted, then returned to Earth. The government declares that it's going to put the abductees in quarantine when they return, but it ends up trying to kill them. However, the teenagers survive the government attack due to the superpowers they were given by the aliens. "The Recall" is one of only a few