Aliens didn't evolve?

Rating: Null/10 (6 March 2007)

I haven't seen this movie in a while, but I never had a question answered, at the time that I saw it. I don't remember how long the aliens had their stuff hidden in our earth, but wasn't it like 50 thousand years or something? Well, that's a very long time.......wouldn't't the Aliens have evolved or something? Grown an extra tooth, or a wing, or something, and maybe not wanted to have a lunch of deli human? We sure have changed over the past 50,000 years, just look at our technology. So.....are we supposed to believe that the aliens have basically the same technology, and the same PLAN, that they had eons ago?? Sounds a little strange, to me. Unless, of course, they had slept all that time.......and woke up hungry?
I thought Tom Cruise was not very good in this film. Like his mind was elsewhere. And Dakota Fanning is hard to take, I'm sorry. Her parents should be more careful about the roles she takes; and avoid the screaming ones. Very few can take that.