A team of Chinese scientists has apparently "proven" that time travel is impossible. Since this is a key premise of many a science fiction book/tv/film storyline, it means the genre has been delivered a grave blow by the Chinese.
Also, it means I won't ever be able to go back in time and do that one thing over again that I've always wished I could. I'm sure everyone's got one of those.
Anyway, in the poll and the comments, feel free to share your opinion on your favorite science fiction films that you can no longer fully support because of the invalidated premise.