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
To the End of the Earth song, which included removing the dubstep beats to focus more on her voice. "To the End of the Earth" was made available for digital purchase on 17 July 2013. A CD single was released on 2 August 2013; it includes two remixes of "To the End of the Earth", the bonus track "Over and Over", and a 6 panel fold-out poster. "To the End of the Earth" received positive reviews from critics. Mike Wass from Idolator described it as a "killer dance track" and noted that Mauboy's "powerful pipes aren't overpowered by the slick house beats and the towering chorus