Could Fast Radio Bursts Be Powering Alien Probes?

Client: Harvard-Smithsonian Center for Astrophysics
Date: 2017
Caption: An artist’s illustration of a light-sail powered by a radio beam (red) generated on the surface of a planet. The leakage from such beams as they sweep across the sky would appear as Fast Radio Bursts (FRBs), similar to the new population of sources that was discovered recently at cosmological distances.
Credit: M.Weiss/CfA