Alien Signals May Be Hiding in a Radio Band SETI Has Barely Explored

A SETI survey of archived ALMA observations found no technosignatures above detection limits.

The study targeted underexplored millimeter and submillimeter radio bands, broadening where scientists can search for extraterrestrial intelligence.

Researchers also found that past telescope pointings likely sampled far more stars than catalog-based estimates suggested.

That means existing telescope archives may offer a much larger pool of SETI search opportunities than previously realized.