Apatosaurus "Apatosaurus" may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of "Apatosaurus ajax" are known exclusively from the upper Brushy Basin Member, about 152–151 mya. "A.louisae" fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional "Apatosaurus" remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to "Brontosaurus". The Morrison Formation records a
Back to the Known remastered for the 2004 reissue, "How Could Hell Be Any Worse?". There has been some confusion over when "Back to the Known" was released. Due to a typo on a number of internet sources and the back cover of the vinyl, many believe that the EP was released in 1984, but this appears to be false. According to a Bad Religion fan site, the EP was recorded in 1985 with then-former and now-current guitarist Brett Gurewitz producing it. No songs from this EP made it on to the band's 1995 compilation album "All Ages". Back to the Known Back to