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
Chinese given name Chinese given name Chinese given names () are the given names adopted by native speakers of the Chinese language, both in majority-Sinophone countries and among the Chinese diaspora. Chinese given names are almost always made up of one or two characters and are written "after" the surname. Therefore, Wei () of the Zhang () family is called "Zhang Wei" and not "Wei Zhang". Despite the relative paucity of Chinese surnames, given names can theoretically include any of the Chinese language's 100,000 characters and contain almost any meaning. It is considered disrespectful in China to name a child after an older