Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping ...

Scientists suggest the first alien signal we detect could be a desperate cry for help from a fading civilization.

Aliens might be transmitting communications signals to each other across exoplanets, some astronomers think. Since these signals are likely sent as narrowband radio waves, we may now have a way to ...

SETI's 1977 "Wow!" signal from deep space was even stronger than originally thought, but its source remains a complete ...

Columbia University professor David Kipping predicts humanity's first alien encounter will be with a rare, "loud" ...

Scientists warn humanity that the first contact with an alien civilisation may be loud, chaotic and extreme, potentially ...

SETI scientists observing a pulsar’s radio pulses over time are redefining how astronomers time pulsars and search for ...

Scientists searched 27 exoplanets for alien technology using planetary eclipses, revealing a new way SETI hunts signals ...

The Search for Extraterrestrial Intelligence (SETI) focuses on finding technosignatures—potential signs of alien technology. If we look carefully, we might have a chance at detecting their ...

The Deep Space Network (DSN) is just the sort of tool aliens could one-day detect, transmitting from Earth. Credit: NASA/JPL What if the first signal ever detected from an alien lifeform wasn't a ...

On Dec. 18, just 24 hours before its closest approach, the Green Bank Telescope scanned frequencies from 1 to 12 GHz. Their ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...