The ethical implications of modifying humans (and all their descendants) were brought into focus with the eugenics movement. Since then, many science fiction novels and films have used aspects of genetics as plot devices, often taking one of two routes: a genetic accident with disastrous consequences; or, the feasibility and desirability of a planned genetic alteration. The treatment of science in these stories has been uneven and often unrealistic.[19][20][21] The 1997 film Gattaca did attempt to portray science accurately but was criticised by scientists.[22] Michael Crichton's 1990 novel Jurassic Park portrayed the cloning of whole dinosaur genomes from fossil remains of species extinct for millions of years, and their use to recreate living animals,[21] using what was then known of genetics and molecular biology to create an "entertaining" and "thought-provoking" story.[23]