Biologists probably think this is hilarious, but I'm not educated enough to know, and so it doesn't bother me. But it didn't ruin the movie since it wasn't central to the plot. That's entirely believable, because Earth organisms have similar limitations. Magic exists, dragons breathe fire, and bears carry birds around in a backpack - whatever you want. That doesn't mean there are no rules, just that you have to write your own.
Computer games are fantasy worlds where rules are made to be broken.
Ernest Adams is an American freelance game designer currently living in England. In a much earlier life he was a software engineer. He has developed on-line, computer, and console games for everything from the IBM 360 mainframe to the Playstation 2. He was a founder of the International Game Developers Association , and is a frequent lecturer at the Game Developers Conference and anyplace else that people will listen to him. The views in this column are strictly his own.