Corrected entry: It was quoted in the film a number of times that the "Harvester Ship" was 3000 miles in diameter, ("It's over the Atlantic." "Which part?" "All of it.") yet there was apparently no problem flying to the centre of the ship in 3 minutes, and back.
Corrected entry: The sphere says that the attacking aliens' ship will leave if the alien queen is killed, even though moments before the sphere said that no one has ever defeated a queen.