From Cloverfield to District 9, Monsters to Skyline - we stand in the midst of the biggest wave of alien invasion movies to hit cinemas in almost sixty years. The trend shows no sign of abating - the likes of Battle Los Angeles and Cowboys and Aliens are due before the end of the year, Area 51, The Darkest Hour and Simon Pegg's Paul follow in 2011.
But what does it all mean? And more importantly, how can you stay safe?
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