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Volcanic activity gave rise to long-necked sauropods

A drastic change in the climate around the beginning of the Jurassic period brought about by extreme volcanic activity may have altered the growth of plants that were the basis for the diets of sauropods, allowing them to grow huge and evolve long necks, according to findings published in Proceedings of the Royal Society B. As tall trees became more prevalent, sauropods' necks grew longer to allow them to reach the treetops, researchers say.

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