SETI

Scientists beamed out a deep-space travel ad to potential aliens in the TRAPPIST-1 planetary system, urging them to visit Lexington, Kentucky.

A new study calls for humanity to prepare for an encounter with extraterrestrial intelligence and examines the social consequences of such contact.

Humpback whale "conversations" provide valuable insight on how humans may one day communicate with life beyond Earth.

Is there life beyond Earth? The question has turned out to be one of the hardest to answer in science.

Researchers are taking seriously the idea that our first evidence of life elsewhere in the cosmos may come in the form of alien technology.

Over 1.6 million star systems have been scanned by Europe's LOFAR system so far, but E.T. hasn't been caught phoning home yet.

The Breakthrough Listen initiative has moved its headquarters to the U.K. to take advantage of the reams of data set to come from the Square Kilometer Array.

Superintelligences might reveal themselves through the technosignatures of their cosmic engineering projects.

Any potential alien messages could be too complicated for humans to understand, but AI trained to detect complex structure in communication could help decipher them for us.

AI is the way forward in the search for extraterrestrial intelligence, from detecting radio signals to finding technosignatures on planets.