Dinosaur Replicas on the Planetarium Grounds

On the James S. McDonnell Planetarium’s grounds reside the perennially popular replicas of a Triceratops and Tyrannosaurus rex. These figures were made by Jonas Studios from molds originally made for the Sinclair Oil Company’s Dinoland Exhibition at the 1964-1965 World’s Fair in New York. Both dinosaurs were originally installed in Clayton’s Oak Knoll Park in 1968, but were re-installed and rededicated on the Planetarium Grounds in 1987.