Why haven't aliens contacted us? Scientists reveal their theories for the lack of any signs from extraterrestrials - despite '100% chance' that they exist

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Why haven't aliens contacted us? Scientists reveal their theories for the lack of any signs from extraterrestrials - despite '100% chance' that they exist

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Despite what UFO enthusiasts might claim, virtually every scientist agrees that humanity is yet to receive a message let alone a visitor from beyond our planet. But in the vast scale of the universe – containing an estimated 2 trillion galaxies – scientists say there is a '100 per cent chance' that there is life somewhere apart from Earth. This raises a intriguing question: If alien life truly is common in the Universe, why haven't we heard from them?
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