Astrobiologists say we could find evidence of microbial life within the next 10–20 years. What does that mean? Where are we ...

Life on Earth may not have started here at all. A scientist says alien intervention is unlikely but still possible, reshaping the debate on our true origins.

If you think auroras on Earth are a strange and mesmerizing sight, that's nothing like what occurs on the perplexing world of Uranus.

New research using the James Webb Space Telescope offers the most detailed portrait yet of how auroras form on Uranus.

A US lawmaker says he has heard classified briefings describing an object of extraordinary size recovered outside the country. The claim has intensified demands in Washington for greater transparency ...