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You've seen it in the movies. Contact with aliens often ends badly for humans. So why do we keep trying to get in touch with them? We don't even know if aliens really exist. But if aliens do exist, and if they're advanced enough to detect our existence, chances are they're doing one of two things. Either they're avoiding us, or they're on their way.But the most important question is, will they come in peace?
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Thumbnail image credit: ESO/L. Calçada. Artist’s rendering showing ESO's Extremely Large Telescope using its lasers to filter out noise in the atmosphere during the image capturing process.
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