Why did the original "Alien" and follow up "Aliens", films work? The back story was far fetched certainly but it had a grittiness, a sense of realism, that denied disbelief. The characters were the sort of rough hewen, mature, resourceful people, you'd expect to find on a space freighter or in the military. It made sense. Now imagine mostly soft faced types, who feel like they belong teaching tutorials on a university campus or running a yoga class, in the same environment. Because that's what you get with "Aliens Earth". You could say its middle class leftist Californians, facing off agains...