California scientists finish 10-year analysis of signals from possible extraterrestrial life and have 100 to home in on
Published on Feb 20, 2026 at 8:32 PM (UTC+4)
by Daisy Edwards
Last updated on Feb 20, 2026 at 9:10 PM (UTC+4)
Edited by
Emma Matthews
California scientists have finished a 10-year analysis of signals from possible extraterrestrial life and have 100 to home in on, and the backstory is peak early-internet magic.
A UC Berkeley team has wrapped up a decade-long deep dive into 12 billion ‘detections’ collected through SETI@home, the famous project that let everyday people donate spare computer power to the alien hunt.
Those detections were basically quick ‘blips’ of radio energy tied to a frequency and a spot in the sky, and most were destined to be junk.
After filtering the pile down again and again, the researchers say they have 100 candidate signals that deserve a serious second look.
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A 10-year analysis of signals from possible extraterrestrial life
From 1999 to 2020, millions of space-loving volunteers worldwide ran SETI@home software on their PCs, helping analyze radio telescope data that had been recorded at the now-defunct Arecibo Observatory in Puerto Rico.
That crowdsourcing helped produce an ocean of potential ‘interesting’ hits, hinting at potential alien activity, but scientists have always known that the universe is noisy, and Earth is even noisier.
A big villain here is radio frequency interference, which can come from everything from satellites to everyday electronics and broadcasts.
To avoid getting fooled by false positives, the team also tested their own pipeline by injecting about 3,000 fake signals nicknamed ‘birdies’ to see what their system could reliably catch and what it might accidentally toss out.
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100 signals to choose from
After that filtering marathon, the final shortlist consists of 100 signals worth a second look, and the team has been pointing China’s FAST radio telescope at those targets since July to see if any of them show up again.
The FAST observations still need to be analyzed, and the researchers are openly realistic about the odds, but the payoff is huge even if none of the 100 turn out to be aliens.
This wraps up one of the most sensitive searches of its kind and hands future SETI efforts a practical playbook: what worked, what did not, and how best to weed out all the cosmic clutter out there.
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