
Action adventure film “Jurassic Park” helped define modern blockbuster filmmaking. The Steven Spielberg monster hit, which is celebrating its 25th anniversary, debuted in theaters on June 11, 1993 to audience raves. With so many famed actors and groundbreaking effects involved, the film’s behind-the-scenes secrets are plentiful. Here are 21 super-interesting facts about the pioneering movie.

Michael Crichton began working on the novel that became the basis for “Jurassic Park” in the 1980s, writing from the perspective of a young boy at a theme park who was present when dinosaurs escaped. He received negative feedback from early readers and reworked the novel into an adult story.