(Live Science) “Fast radio bursts are exceedingly bright given their short duration and origin at great distances, and we haven’t identified a possible natural source with any confidence,” Avi Loeb, a scientist at the Harvard-Smithsonian Center for Astrophysics who was not involved in the discovery, said last year in a statement related to new research on these bursts.

He added that an “artificial origin” of the signals (i.e., extraterrestrial intelligence) is worth considering. Other possible origins include supernovas (exploding stars), supermassive black holes or various other sources of mighty electromagnetic radiation, such as pulsars.