It is one of the most famous and talked about films in cinematic history, but there are many people who still don't know that Jurassic Park is actually based off a book. Written just three years before the release of Steven Spielberg's movie classic, Michael Crichton's novel of the same name laid out the initial themes and storyline adopted by its counterpart, but there are many differences between the two.
In making his film, Spielberg took a lot of Crichton's source material and gave it new life on the silver screen. Genetically engineered dinosaurs; the emphatic and vibrant tropical island setting; the witty and cocky character of Dr Ian Malcolm - so many brilliant parts of the movie are pulled straight from the page.
But, there was also a lot he didn't use, and readers picking up the novel for the first time may be shocked when they find out just how different the original story is from their favourite dino-movie.
So, do you think you know Jurassic Park? Well think again, because in this list we have the biggest and most unbelievable differences between the 1993 Jurassic Park movie and the 1990 novel.
Safe to say, there will be SPOILERS ahead for both the film and book...