First contact with aliens is a common theme in many science fiction stories. Often depicted as either the most remarkable event in human history or its end, it would undoubtedly change everything we have ever thought about existence forever.
But, should things turn nasty, what could we really do to evade extinction? Let's take a look.
It is probably worth exploring if we actually have anything to fear before we get into the nitty-gritty about potential defensive strategies for our planet. While we can only know for sure if an alien species would be aggressive by actually meeting them, we can make some educated guesses about how such an encounter may turn out.
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