Researchers reported that a forearm bone from a velociraptor fossil displays quill knobs, which are bumps on the bone where feathers are anchored.

• 研究人员报导说，在迅猛龙尺骨（前臂骨）化石上显示出羽根节，这些羽根节是羽毛所被固定住的骨头上的隆起处。