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Carl Sagan is an absolute legend and a hero, and his book Contact and the movie it’s based on is phenomenal. HOWEVER… we examined the central conceit of the story – that aliens pick up our radio signals and return a message with instructions to build a machine – and look at the stars inside the 100 light-year bubble around Earth where our radio waves have traveled. And the potential of this happening… Well, it isn’t good.

Sorry Carl.

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