Astronomers swept millions of candidates and found no alien signals from K2-18b, setting the first power limit on any ...

SETI Institute's radio scans of interstellar comet 3I/ATLAS found no evidence of alien technology, confirming its natural ...

A group of Chinese scientists is diving deep into the cosmos in search of alien radio signals from the TRAPPIST-1 star system, which might house planets that could support life. This is no small feat, ...

For decades, humanity has scoured the cosmos for any signs that we aren't alone in the universe. NASA spacecraft like the twin Voyager probes – launched in the 1970s bearing the iconic Golden Record – ...

How Radio Astronomy Helps Us See the Invisible Cosmos," astrophysicist Emma Chapman describes the hidden corners of space that only radio waves can reveal — and makes the case for contacting aliens.