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
Beulah (given name) of William Blake, for example several times in "The Four Zoas". Beulah (given name) Beulah (), a feminine given name, originated from the Hebrew word (בְּעוּלָ֑ה "bə‘ūlāh"), used in the Book of Isaiah as a prophesied attribute of the land of Israel. The King James Bible transliterates the word and translates it as "married" (see ). An alternative translation is "espoused", see for example (Mechon Mamre). The "Online Etymology Dictionary" relates the word to "baal", meaning "owner, master, lord". Literary works have used "Beulah" as the name of a mystical place, somewhere between Earth and Heaven. It was so used