Galactic Beacons: Evaluating Pulsed Extraterrestrial Signals Against Natural Phenomena
To the point
James Benford and Dominic Benford argue that alien beacons could be drifting, pulsed signals that sweep the sky and resemble natural sources, so although mega-engineered transmitters are possible, real transmissions would be extremely energy-intensive and likely brief, making them hard to detect.
