Modern astrobiology suggests that alien life would evolve under many of the same ruthless pressures that shaped organisms on Earth. Scientists expect traits like symmetry, vision, camouflage, ...

What if some stars we see host alien megastructures? Scientists suggest cooler stars might be surrounded by giant Dyson ...

Are we alone in the Universe? With more than 100 billion galaxies in the observable universe and at least 500 billion planets ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

Researchers in a recent breakthrough study have found the possibility of structures in the Milky Way that could be built by ...

A Soviet astronomer in the 1960s proposed a scale to classify hypothetical alien civilizations. Here’s why the framework is ...

A new study by Amirnezam Amiri of the University of Arkansas explores how these hypothetical "Dyson swarms" would appear ...

Only at the precipice do we evolve.” Those words, spoken by Professor Barnhardt in The Day the Earth Stood Still, capture one ...

Get the latest federal technology news delivered to your inbox. You might think this column is about UFOs and the Pentagon's ...

When the U.S. was born, humanity was still seven years away from balloon-borne flight. Where might we be another 250 years ...

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to lead a team of outside scientists to study the national security risks ...