Scientists have found a hidden biosphere stretching miles beneath Earth’s surface and as deep as 6 miles below the seafloor.

The Supreme Court has upheld a broad conception of birthright citizenship, rejecting President Donald Trump’s executive order.

The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

Case in point: Scientists from Tokyo University and Hokkaido University in Japan stumbled across some mysterious jet-black ...

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

Deep within Uranus and Neptune, immense pressure and heat are transforming carbon into diamonds that rain down through the ...

The International Space Station is now home to an even more capable quantum laboratory, where NASA cools atoms to nearly ...

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

Astronomers may have witnessed one of the rarest and most dramatic cosmic events ever seen: a long-sought intermediate-mass ...