News in Brief Paleontology

Duck-billed dinosaurs roamed the Arctic in herds

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

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

KAREN CARR ILLUSTRATION

By Meghan Rosen

- More than 2 years ago

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.