3. Asteroids Don't Explode On Impact - Armageddon
Armageddon came out just a few months after the slightly better Deep Impact in 1998, but nobody remembers that because it didn't have Bruce Willis being all bald and heroic in it. The proximity of the two releases is probably down to news stories which were appearing at the time referring to an asteroid NASA had spotted which they believed could hit Earth in the near future (it has since been concluded, thankfully, that said asteroid will actually just miss us). Anyway, if you were expecting a Michael Bay film as disastrous as the asteroid collision it predicts, you'd be disappointed - this isn't a bad movie, and it used Actual Science to predict how to deal with such a monstrous asteroid. But Wait... So, what's wrong here? How about asteroids which emit fiery explosions when they crash into concrete? Contrary to popular belief, rock from outer space is unlikely to contain TNT. Then there's the bizarre fact that NASA chooses to train oil-drillers how to become astronauts in order to carry out the most important space mission in the history of humanity. But that's not bad science, it's more like action movie moron logic. Finally, there's Steve Buscemi's character's 'space dementia'. There is little or no evidence that anyone suffers random memory loss simply from going into space. That doesn't mean it doesn't exist, just that the film's certainty is a little misleading.