Many dino-fans argued that at least the sequels of Jurassic Park - The Lost World released in 1997 and Jurassic Park III released in 2001 - should have shown dinosaurs with feathers, reflecting the scientific discoveries at the time. In his 1993 movie, Spielberg wanted the dinosaur models to lack feathers and have darker colors in order to create a dragon-like appearance.
Preserved pigments in fossil feathers support the view of dinosaurs as colorful animals. Recent discoveries show that some sauropod and ceratopsian dinosaurs were covered with bristles and filaments. In 2007 a team of scientists at the American Natural History Museum showed that a specimen of Velociraptor excavated in Mongolia in 1998 had small pits on its forearm, likely the insert points of feather quills. in the skeleton also traces of feathers on forelegs and tail. The dinosaur Aurornis xu from the Cretaceous period of China displays along with bird-like elements.
