Mission Dolores was founded by Spanish missionaries the same year the U.S. declared its independence. It has borne witness to ...

A siphonophore—a colonial marine invertebrate related to the venomous stinging Portuguese Man-o-war—is scanned using Deep ...

NASA unveiled four patriotic-colored images of the cosmos to celebrate America's 250th birthday, revealing everything from an ...

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

Astronomers have revealed new details about the makeup and age of a visiting comet that was born around a distant star. They ...

Are aliens real? Was Fox Mulder right all along? We examine the prediction markets to gauge if the U.S. government will confirm that aliens exist before January 2029. The prediction market on a U.S.

NASA's Chandra X-ray Observatory has released four stunning images of cosmic wonders, depicted in red, white and blue for the ...