* Ignoring the numerous [[ArtisticLicensePhysics physics goofs]] in the movie, if the sunlight-exploding device is so easy for any old primitive species to create and is an unstoppable weapon, why hasn't another alien race in the universe built one and turned it on? How do they even know such a device would work without evidence?
** [[http://www.smbc-comics.com/index.php?db=comics&id=2138#comic And we call it the "Big Bang."]]