Diplodocus now common scientific opinion that "Seismosaurus hallorum" is a species of "Diplodocus". This genus of dinosaurs lived in what is now mid-western North America at the end of the Jurassic period. "Diplodocus" is one of the more common dinosaur fossils found in the middle to upper Morrison Formation, between about 154 and 152 million years ago, during the late Kimmeridgian age. The Morrison Formation records an environment and time dominated by gigantic sauropod dinosaurs, such as "Apatosaurus", "Barosaurus", "Brachiosaurus", "Brontosaurus", and "Camarasaurus". "Diplodocus" is among the most easily identifiable dinosaurs, with its typical sauropod shape, long neck and tail, and
Lesser Known Heaven" on January 11, 2011 and "Rio" on February 17, 2011. Boeldt worked with Elena Johnston in creating what described as the "pretty ominous" cover art for "Lesser Known", whom Johnston chose the pictures and helped him put the chosen images together on the artwork. Reviews from music journalists upon release were generally mixed. Some reviewers disliked "Lesser Known" for having the same main problem as Adventure's debut album, that it only focused on recreating old music that was already easy to access both online and retro 1980s music stations without trying to cross over any boundaries or taking any