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 from the Hyadean government trying to colonize Earth, is fairly peaceful. Hyadeans wish to learn more about Terrans and socialize them. While there are some who do not trust the aliens, many Terrans accept and befriend them. This friendship only increases after the war ends. The Hyadeans’ not-so-alien characteristics become even less distinct the more they remain in contact with Terran culture. While Hyadeans tend to be utilitarian, many admire Terran arts. Terran movies, music, and souvenirs are cherished in Chryse. The Hyadeans on earth often adopt non-physical human characteristics and traits. For example, one Hyadean starts wearing decorative clothing,