It is conceivable that a civilization advanced enough to see itself in a cosmological context would think of a way to make itself known to the universe. In “The Messenger: A Galactic Center Gravitational-Wave Beacon” pre-print on Arxix, an international team of researchers have proposed a hypothetical alien craft, a beacon at the Milky … Continue reading “The Messenger” –Unambiguously Artificial Gravitational-Wave Signals