If the energy required to send FRBs is equivalent to hundreds of sol-sized masses then it’s vanishingly unlikely that the phenomenon is non-natural. Any technologically advanced alien civilization willing to waste that amount of power to send a totally pointless signal across hundreds of millions of light-years would be, essentially, brain-dead and therefore incapable of constructing the necessary technology in the first place. There is no plausible reason for such a construction. We like to think angels visit us and aliens want to contact us, but that is only because we have tiny ape-brains and aren’t very good at dispassionate reasoning.

Anyone who enjoys my articles here on Medium may be interested in my books Why Democracy Failed and The Praying Ape, both available from Amazon.