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 Edge of the Earth EP", which was released in September 2013. The second track, "Against the Voices", has been a "long-time fan favorite," as the song was first played by the band live in 2010. However, it hadn't made the cut for Switchfoot's two previous full-length albums, "Vice Verses" (2011) and "Fading West" (2014). According to the band, the song "What It Costs" marked the first song recording for which bassist Tim Foreman provided lead vocals, replacing his brother Jon Foreman. The Edge of the Earth The Edge of the Earth is an extended play by American rock band Switchfoot, released digitally on September