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

Archived radio observations could open new frequencies to SETI while showing that past searches covered millions more stars than previously estimated. A potential extraterrestrial signal could be hiding in radio frequencies that modern searches for intelligent life have barely examined. Most radio SETI (Search for Extraterrestrial Intelligence) projects concentrate on frequencies from 1.42 to 1.66 [...]