SETI

Are aliens running out of places to hide? It turns out we've searched much more of the galaxy than we realized

By Keith Cooper Published 4 August 26

Astronomers may have already scanned millions of more stars than they thought, a realization that might lead to new ways to hunt for extraterrestrial radio signals.

Are we overlooking signs of alien life that aren't technological or biological? 'Bread would be a signature of intelligence'

By Keith Cooper Published 27 July 26

Between biosignatures and technosignatures lie noosignatures, and some scientists think they could help us find alien life someday.

America at 500: Where will we be in space in 2276?

By Mike Wall Published 3 July 26

When the U.S. was born, humanity was still seven years away from balloon-borne flight. Where might we be another 250 years from now, should the nation be fortunate enough to survive that long?

How should we handle alien detection in a world of AI, deepfakes and social media? This committee is writing the rulebook

By Keith Cooper Published 9 June 26

If and when SETI discovers alien life, then a revised Declaration of Principles guarantees that once the discovery has been verified, its disclosure will come soon thereafter.

Making contact with ET? Aliens may already know we're here

By Leonard David Published 23 April 26

Earth is dotted with many humongous, human-made structures. To an alien eye, they may be tell-tale signs of intelligent goings-on, betraying our existence and hinting at our capabilities.

Disclosure day: If ET made contact, how would we handle the news?

By Leonard David Published 4 April 26

How would people react if an alien civilization actually made contact with us? Space.com talked to experts, who shared a variety of opinions about a possible real-life "disclosure day."

Where are all the aliens? Maybe they just don't want to talk to us

By Leonard David Published 17 March 26

A civilization capable of interstellar travel may also be one that has moved beyond conquest, excess and ecological self-destruction — and it therefore may not want to talk to us.

Where are all the aliens? Maybe space weather is scrambling their transmissions

By Keith Cooper Published 8 March 26

We may be missing alien radio signals because they have become smeared beyond the narrowband detectors that SETI utilizes, a new study suggests.

Astronomers searching for alien life are sharpening our cosmic clocks. Here's why

By Sharmila Kuthunur Published 16 January 26

Tiny delays in pulsar signals measured by SETI scientists could aid the search for gravitational waves and extraterrestrial life.

This SETI program is chasing down its final 100 signals. Could one of them be from aliens?

By Keith Cooper Published 15 January 26

SETI@home has been one of the largest citizen science projects ever, with millions of users around the world.