Our Feathered Friends
Really Big Birds
Within ten years of the discovery of Archeopteryx in 1861, Huxley had proposed a close evolutionary link between the dinosaurs and birds. That notion was devalued in much of the Twentieth Century, but has more recently been decisively confirmed.
Feathered dinosaurs don't seem to have been rare. The ancestor of the Tyranosaur had feathers.
These would have given Jurrasic Park a fluffier aspect.