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Geological Time Scale Geological Events Mass Extinctions Geological History Cretaceous Period Triassic Period Mesozoic Era Prehistoric Life Paleozoic Era Geological Periods Mass Extinction Events Ordovician Period Ice Ages Climate History Precambrian Era Pleistocene Era Cryogenian Period Devonian Period Meteor Impacts Paleoarchean Era Early Earth Asteroid Impacts Jurassic Period Climate Evolution Geological Processes Neoproterozoic Era Climate Events Ancient Craters Extinction Events
The fossil 'Sue,' preserved in an 'inside-out' state, offers a glimpse into ancient marine life during a mass extinction but leaves evolutionary questions unanswered.
