These dinosaurs were the forerunners of the bigger and more spectacular ornithischians like stegosaurus, ankylosaurus and the duck-billed dinosaurs.

这些恐龙都是更大更壮的鸟臀目恐龙，例如剑龙、甲龙和鸭嘴龙的先祖。

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Much to their surprise, they found that only one group suffered from cancer-the hadrosaurs, or "duck-billed" dinosaurs. 29 benign tumors were found in the tail bones of 97 animals.

另科学家十分惊奇的是，仅有一组恐龙是癌症的受害者——它就是鸭嘴龙。研究人员在97个恐龙的尾骨里发现了29个良性肿瘤块。

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During the times of isolation, a number of species of giant duck-billed dinosaurs "roamed a much smaller area than you might think given that many were larger than elephants, " Gates said.

MSN: Dinosaur boom linked to rise of Rocky Mountains

New species of duck-billed and horned dinosaurs were being born at an explosive rate of every few hundred thousand years during the brief time when the two mountain ranges and the seaway coexisted.

MSN: Dinosaur boom linked to rise of Rocky Mountains

The plea agreement required that he abandon all claims on the T. bataar and the duck-billed dinosaur, and on four more Mongolian and Chinese dinosaurs to which federal prosecutors could now connect him: two oviraptors and two more T. bataars, one of them believed to be somewhere in Great Britain.

NEWYORKER: Bones of Contention