The tailbones indicated that the specimen belonged to a dinosaur that was not a prehistoric bird and also provided researchers with insight into the evolution of feathers.
尾骨显示该标本来自一只恐龙,而非史前鸟类,还让研究者得以更加深入地了解羽毛的演化。
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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 tailbones of 97 animals.