"Evolution" is a comedy starring David Duchovny, Dan Aykroyd, Seann William Scott and Julianne Moore (an otherwise serious actress). The man behind the movie is Ivan Reitman, which may explain why some of the monsters in "Evolution" look suspiciously similar to the ghosts in "Ghostbusters", another Reitman classic.
"Evolution" is very light entertainment. Every other joke contains juvenile references to sex, fecal matter or nude behinds. As usual, the main character has a funny African-American sidekick. Also as usual, there is a smart female scientist involved, plus a whole lot of really stupid army officers and...of course, a state governor! Frankly, we've seen this before. The high school students are also stereotyped, including the stupid blonde girl and the two fat dorks (who naturally turn out to be heroes).
Is this funny? I think it depends on what mood you're in when watching it. The movie isn't badly produced, and the actors are all top of the class. But yes, if you want more substance or don't get the parody part, you might want to scream!
The plot is fairly straight forward. A meteorite collides with Earth. Or is it Arizona? The slime of the meteorite quickly evolves into monstrous fish, flying dinosaurs and blue (!) ape-men with a penchant for skull bashing. The dinosaur flies into a shopping mould and creates the usual panic. The military are called in and attempt to stop the monsters with napalm, which naturally gets the exact opposite effect. Eventually, the world is saved when the two fat bozos reveal that the monsters can be defeated by spraying them with Head & Shoulders shampoo!
OK, that was a new angle. I think.
In my opinion, "Evolution" isn't the best movie, or even comedy-parody, around. But as light Friday night entertainment, I guess it's alright.