In 1993 Steven Spielberg directed the science fiction techno-thriller film Jurassic Park, based on the novel by Michael Crichton, and adapted by Crichton for the screen. It was produced by Spielberg's Amblin Entertainment, Universal City, California. With gross sales of $914,000,000 when released, Jurassic Park was also among the highest-grossing and most profitable films ever made.
The plot of Jurassic Park centered around the possibility of re-creating dinosaurs by
"cloning genetic material found in mosquitoes that fed on dinosaur blood, preserved in Dominican amber. The DNA from these samples was spliced with DNA from frogs to fill in sequence gaps. Only female dinosaurs are created in order to prevent uncontrolled breeding within the park" (Wikipedia article on Jurassic Park [film], accessed 05-25-2009)