It seems unlikely that, in a universe so vast, we're the only intelligent life that exists. Although we can fashion several hypotheses that might explain our apparent solitude, the most popular ...

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For centuries, great thinkers have pondered why, given the hundreds of billions of planets in the galaxy, we have seen no compelling signs of intelligent life beyond Earth. Now, scientists are mulling ...

From Harvard this week comes a compelling and evidence-based answer to the evergreen question: if there's life beyond our planet, where is it? The scientists' logic goes like this: Our sun is an ...