“A positive result in a search for the pattern would be one of the great experiments in the history of science.” Unidentified point-like very high energy gamma ray sources in the Milky Way may actually be starships of hyper-advanced alien civilizations who are actively exploring interstellar space, proposes Louis Crane in Searching for Extraterrestrial Civilizations Using Gamma Ray Telescopes.
From our tiny blue water planet, the universe appears inconceivably vast. In the grand cosmic scheme of things, all the light in the observable universe provides about as much illumination as a 60-watt bulb seen from 2.5 miles away, says Marco Ajello, an astrophysicist at Clemson University, who led a team that has measured all of the starlight ever produced throughout the history of the observable universe.
