Factual error: Gallaxhar scans the galaxy to find the missing quantonium. The scanner zooms in on earth, showing it to be very close to the center of the galaxy. Earth is actually nowhere near the center of the galaxy; it's located much closer to the outer edge.
Monsters vs Aliens (2009)
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Directed by: Conrad Vernon, Rob Letterman
Starring: Kiefer Sutherland, Reese Witherspoon, Seth Rogen, Hugh Laurie, Will Arnett
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More mistakes in Monsters vs Aliens
Dr. Cockroach, Ph.D.: I'm not a quack. I'm a mad scientist.
Trivia: Keep watching the end credits, there are additional scenes.
Question: If Derek values his career to Susan, then why did he ask her to marry him in the first place?
Answer: Image. A good-looking man. A beautiful woman at his side. It would look good in the news.