Suspenseful but illogical

Rating: 5/10 (5 July 2005)

Why did the aliens bury machines over a million years ago? Why not take over the planet then? Why did the force fields lose their resistance when the aliens got sick? My car works fine when I'm not feeling well.
The entire episode with Tim Robbins added nothing to the movie. It should have been deleted.
How did the son survive? They should have killed him off.
Why were the aliens disintegrating the humans early in the movie, sucking their blood in the middle, and then capturing them at the end? But despite all the plot flaws, the movie was suspenseful and held your interest.