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Duck-billed dinosaurs roamed the Arctic in herds

Young and old hadrosaurs lived together, track site in Alaska suggests

1:45pm, July 9, 2014

HERD MENTALITY Duck-billed dinosaurs lived together in multigenerational herds in the Arctic, thousands of new tracks in Alaska suggest.

Duck-billed dinosaurs were the wildebeests of the ancient Arctic.

Around 70 million years ago, during the Late Cretaceous, the plant-eating reptiles probably lived in multigenerational herds — just like modern grazers, a dinosaur track site in Alaska suggests.

The tracks, a jumbled bunch of large and small footprints, are the first solid sign that duck-billed dinos, or hadrosaurs, settled together year-round in the polar region, which at the time probably had a climate similar to the modern Pacific Northwest’s. The animals “weren’t just accidental tourists in this area,” says Anthony Fiorillo. “They were thriving.”

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