Use precise geolocation data. Actively scan device characteristics for identification. Store and/or access information on a ...

In the Age of Dinosaurs, survival often came down to endurance rather than speed. Find out who the fastest dinosaurs would ...

Added Jan 25, 2010 at 12:56PM EST by Brave Sir Robin.

因为剑角龙的化石相当完整，常被当成参考模型来完成厚头龙类的重建。当剑角龙首次被发现时，它们被认为是伤齿龙的近亲。直到1945年，剑角龙的头颅骨被发现时，发现它们与伤齿龙有显著差别，所以这个理论被淘汰了 [1] 。厚头龙类的化石大部分只有颅骨 ...

Judy Jehelornis can't remember where her home is. / The kids see new life growing back. Buddy, Tiny, and their old friend Petey Peteinosaurus are joined by a lost bird named Judy Jehelornis, who ...