`  ==Starship Troopers== I just added the reference to Starship Troopers. While I believe the balls as ``race`` in general could be a reference to the bugs, I think that the balls could also have a different origin. (For example since Zapp Brannigan claims that there is nothing known of the balls, while in Starship Troopers the things he mentions are in fact known.) The bottom line is, I think only the brain balls are a strong enough reference to be listed in the article. - `