The core premise involves extracting dinosaur DNA from prehistoric mosquitoes trapped in fossilized amber. Scientists at InGen (International Genetic Technologies) fill in the gaps of the fragmented dinosaur DNA sequences using DNA from modern-day frogs. This genetic engineering allows them to clone and breed living dinosaurs for a theme park, though the use of frog DNA leads to unforeseen consequences, such as the dinosaurs changing sex and breeding.

John Hammond is the billionaire philanthropist and CEO of InGen, the company responsible for creating Jurassic Park. In the movies, he is portrayed by Richard Attenborough as a charming, visionary dreamer who wants to show the world something "real" but fails to grasp the dangers of his creation. In Michael Crichton's novel, he is a much darker, greedier, and more arrogant capitalist.

The original "Jurassic Park" (1993) features several iconic dinosaurs: the Tyrannosaurus Rex (the park's star attraction and inadvertent savior), Velociraptors (highly intelligent pack hunters), Brachiosaurus (the first dinosaur seen, showing their majesty), Triceratops (a sick dinosaur treated by Dr. Sattler), and Dilophosaurus (which attacks Nedry with venom).

Jurassic Park is located on a fictional island called Isla Nublar, situated 120 miles off the west coast of Costa Rica. The sequel, "The Lost World," introduces a second island, Isla Sorna (Site B), where the dinosaurs were bred and nurtured before being moved to the park on Isla Nublar. Filming for the island scenes largely took place in Hawaii (Kauai and Oahu).

John Hammond invites a team of experts to endorse the park: Dr. Alan Grant (a paleontologist), Dr. Ellie Sattler (a paleobotanist), and Dr. Ian Malcolm (a mathematician specializing in Chaos Theory). They are joined by "the blood-sucking lawyer" Donald Gennaro and Hammond's grandchildren, Lex and Tim Murphy, who become trapped in the park when the systems fail.

Chaos Theory, championed by Dr. Ian Malcolm, suggests that complex systems (like a dinosaur theme park) are inherently unpredictable and that small changes can lead to massive, uncontrollable consequences (the Butterfly Effect). Malcolm predicts the park's failure, arguing that "life finds a way" and that attempting to control nature is a fool's errand. The events of the movie prove him right.

The park's security systems were deactivated by Dennis Nedry, the disgruntled lead computer programmer. Nedry shut down the power to the fences (except the Raptor pen) to sneak stolen dinosaur embryos off the island for a corporate rival. This act of sabotage, combined with a tropical storm, allowed the T-Rex and other dinosaurs to escape their enclosures and wreak havoc.

Real Velociraptors were much smaller (about the size of a turkey) and covered in feathers. The "Velociraptors" in the movie were actually based on a related species, Deinonychus, which was larger. Spielberg exaggerated their size further for dramatic effect and omitted the feathers (which were not widely accepted in paleontology at the time of the film's production).

Steven Spielberg's "Jurassic Park" is a landmark in cinema for its pioneering use of Computer-Generated Imagery (CGI) by ILM mixed with practical animatronics by Stan Winston. It set a new standard for visual effects, making digital creatures look realistic for the first time. It was the highest-grossing film of all time upon release and spawned a massive multi-billion dollar franchise.

"Jurassic World" (2015) serves as a soft reboot/sequel to the original franchise. It takes place 22 years after the original events, where a fully functional dinosaur theme park has finally opened on Isla Nublar. The new trilogy explores the consequences of genetic hybridization (the Indominus Rex) and the eventual spread of dinosaurs into the wider world ("Dominion").