SETI Institute Study: Alien Signals May Blur and Broaden in Space, Suggesting We’ve Been Searching for the Wrong Kind

To the point

Vishal Gajjar and Grayce Brown, with John Elliott, say signals from distant civilizations can broaden into wider, fainter patterns as they travel through stars’ plasma winds, so past searches may have missed them and future efforts may have a better chance by looking for blurred signatures rather than clean lines, though how often this happens and how best to detect such signals remains unknown.