SETI's Expanded Reach: Commensal Radio Data Cover Millions of Stars Beyond Optical Catalogues

To the point

Louisa Mason shows that radio observations from Green Bank and Parkes cover far more stars than catalogues suggested and that archival ALMA data enable searches at higher frequencies, broadening SETI beyond the usual water-hole even though no technosignatures were found.

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Astronomers may have unknowingly searched far more of Milky Way for alien signals
indianexpress.com

Astronomers may have unknowingly searched far more of Milky Way for alien signals

Researchers found radio telescopes have unknowingly surveyed millions of additional stars, revealing the search for alien civilisations has been broader than scientists realised.