6 billion years old and home to more than 100 billion stars. This reality suggests there is likely a mind-boggling number of ...

The Fermi Paradox asks a simple question: if alien civilizations should be common, where is everybody? The Zoo Hypothesis offers a chilling answer—advanced civilizations may already be out there, ...

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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 ...