Evolution

Evolution is a 2001 American science fiction comedy film directed by Ivan Reitman and starring David Duchovny, Orlando Jones, Seann William Scott, Julianne Moore and Ted Levine. In the United States, it was released by DreamWorks and internationally, it was released by Columbia Pictures.

The plot of the film follows college professor Ira Kane (David Duchovny) and geologist Harry Block (Orlando Jones) who investigate a meteor crash in Arizona. They discover that the meteor is harboring extraterrestrial life which is evolving very quickly into large, diverse and outlandish creatures.

Evolution was based on a story by Don Jakoby, who converted it into a screenplay along with David Diamond and David Weissman. The movie was originally written as a serious horror science fiction film, until director Ivan Reitman re-wrote much of the script. Shooting took place in California with an $80 million budget and the film was released in the United States on June 8, 2001. The movie grossed $98,376,292 internationally. Reviews for the film were mostly unfavorable, as the movie review aggregation website Rotten Tomatoes gave the film a 42% positive rating.

A short-lived animated series, Alienators: Evolution Continues, that was loosely based on the film was broadcast months after the movie was released.

Source
Wikipedia article on the film