Most alien-signal searches listen to a narrow part of the radio spectrum, but astronomers are now testing higher frequencies that have barely been explored. A first search using archived ALMA ...

Black holes can release enormous energy through hot disks, surrounding plasma and powerful jets, enough to support a civilization far beyond ours. Any giant collector would release unused energy as ...

Looking ahead: Existing radio surveys may contain signals that were never recognized as potential technosignatures. New ...

For decades, scientists searching for extraterrestrial intelligence have focused their telescopes on a small slice of the ...

A new study published as a preprint on arXiv suggests that advanced extraterrestrial civilizations might not need to surround ...

Searching for extraterrestrial intelligence has so far primarily meant focusing on one particular type of signal—and that ...

Is anybody out there? Probably. Most stars have planets; we've discovered more than 6,000 exoplanets thus far, and the most basic statistics point toward the existence of countless potentially ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got stranded on earth when his alien compadres abandoned their botany mission. In ...

We’ve likely had at least one close encounter of the 3I kind before. Harvard scientist Avi Loeb claims that not only does 3I/ATLAS potentially have alien origins, but that this wouldn’t be the first ...

“There is a silence in the night sky that has bothered me for as long as I can remember.” That line, attributed to Richard Feynman, lands because it gets at a simple, stubborn feeling. The sky looks ...

In 1950, famed astrophysicist Enrico Fermi posed a profound question during a casual lunch with colleagues: Where is everybody? In other words, if there’s an extremely high probability that advanced ...

For decades, SETI researchers have focused on finding narrow-band radio signals that might stand out from the natural universe. But what if an advanced civilization that wanted to communicate would ...