A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. A pair of two-foot-long, anteriorly bent, spines running down its neck might have served as passive defense structures

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A new long-spined dinosaur from Patagonia sheds light on sauropod defense system. A pair of two-foot-long, anteriorly bent, spines running down its neck might have served as passive defense structures