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Dinosaurs Species Evolution Ancestry Insect Evolution Co-evolution Great Oxidation Event Cretaceous Period Species Origins Species Development Amniotes Amphibians Transition from Sea to Land Pterosaur Evolution Arachnid Evolution Charles Darwin Human Ancestry
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.
