And the fossils span their entire realm, from when they first appeared on earth about 23O million years ago during the end of the Triassic period, to their twilight age 65 million years ago in the Cretaceous: a stretch of some 160 million years when they ruled the planet.
而這些化石橫跨的世代，則從恐龍初現地球的二億三千萬年前三疊紀晚期，到六千五百萬年前白堊紀恐龍大滅絕的前夕，為期約一億六千萬年地球霸主的活動生態，都可在中國大地上找到軌跡。