It's clear that as long as Ivan Reitman works in sci-fi comedy he will never achieve the greatness he did with Ghostbusters. That movie was a masterpiece of genius. Evolution is nothing but a fun ride that comes nowhere near the class of Ghostbusters. But it's still well worth it.
Weird really when you consider that Ghostbusters: Go to Hell, the second sequel in which hell got so full that spirits started spilling out into the real world, was re-written and redrafted that it became this...something completely different. You probably know the story. A meteor crash lands in the desert and the single celled organisms living on it very, very quickly become multi celled and then little worm creatures and then...many other things. The movie repeatedly calls them aliens but since they evolve from nothing on earth and are conditioned by earth's environment they are, effectively, earth creatures. Watching them run riot and cause havoc is the main fun of this film.
Ghostbusters had a dry, sarcastic sense of humor, like a fine wine. Evolution has a crude, gross-out sense of humor like American Pie, which seriously lessens the overall quality of the film. The lead trio of actors perform rather well together. Duchovny is much looser and easy-going here than his stiff, X-Files character. Seann William-Scott once again plays a dufus but he's more endearing here than he has been in other roles. Orlando Jones is kind of good but he too often takes his role in the stereotyped 'only black guy in a white movie' direction. Sadly though, Julianne Moore's accident-prone scientist just isn't funny and her clumsiness seems false and forced.
But obviously when you judge Evolution next to something better it seems an inferior movie. Judge it on it's own terms and you'll definitely enjoy. The DVD is in 1.85:1 anamorphic widescreen (though it really could have benefited from a scope 2.35:1 aspect ratio) and is in rather lacklustre Dolby 5.1