Could humans spread Earth life beyond our planet? Astrobiologists explain where extremophiles might survive and why the risks ...

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

When the U.S. was born, humanity was still seven years away from balloon-borne flight. Where might we be another 250 years from now, should the nation be fortunate enough to survive that long?

For decades, humanity has searched the universe for signs of alien life — but some scientists warn that finding it may come with terrifying consequences. This video explores NASA’s Voyager missions, ...

A set of protocols telling scientists what to do – and what not to do – if they ever detect evidence of intelligent life ...

The Trump administration has tapped a Harvard professor with controversial theories about aliens to lead a team of scientists ...

Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

Whether he meant to or not, Steven Spielberg has been trying to convince the world of alien existence for over 40 years. He’s donated money to research programs. He’s discussed the issue with ...

Steven Spielberg isn't just the director of several classic movies featuring aliens. He's also a believer. His father, Arnold Spielberg, was an electrical engineer and big science fiction reader who ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home planet.