If alien civilizations rise and fall, they may leave behind artifacts long after they are gone. From abandoned megastructures ...

First contact with extraterrestrial intelligence may be anything but subtle. Researchers argue that our initial signals from alien worlds will likely be loud, dramatic, and indicative of civilizations ...

In 1883, a comet capable of ending life on Earth narrowly missed impact. Only one man on the planet noticed, a Mexican ...

New theoretical models have strengthened the case that immense, energy-harvesting structures orbiting their host stars could ...

There’s no denying the allure of alien artifacts. Science fiction is awash in the material remnants of extraterrestrial civilizations, which surface in everything from the classic books of Arthur C.

But now, 60 years after the Prime Directive was introduced to Star Trek lore, Starfleet Academy has just evolved the ...

A scientist at the University of Glasgow has delved into the possible existence of ...

A "crowdsourced" project in which home computer users were enlisted to help analyze radio signals from space is ending after ...

Elon Musk discussed his views on whether aliens exist during a discussion at the World Economic Forum in Davos, Switzerland. Newsweek reached out to Musk’s company SpaceX for additional comment via ...

Elon Musk didn't pitch a new rocket. He pitched a new reality. Speaking at SpaceX's Starbase facility in Texas earlier this ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the largest searches for alien intelligence in history is nearing completion, thanks to the help of more than 2 million ...