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A Chinese radio telescope detected radio signals that researchers said could be technological traces of an alien civilization. The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in ...

In 1967, astronomers thought they had finally heard from the neighbors. They intercepted a signal so regular and precise it seemed impossible for it to be natural. But the excitement didn’t last.

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has ...