Jurassic Park (movie)
Along with a mathematician named Ian Malcolm and a lawyer named Donald Gennaro, they go to the park and see a few dinosaurs, like Brachiosaurus. John says that the dinosaurs were brought back because of the dinosaur DNA found in some mosquitoes. To fix any broken parts of the DNA, they added the DNA of frogs to the dinosaurs. The dinosaurs were all made to be female so that they would not breed.