Astronomers build on the Drake Equation to probe the chance that humans will find existing aliens. The answer: Not likely. By Lisa Grossman.

When Nikolai Kardashev looked into the question of where to find advanced extraterrestrial civilizations, he argued that the obvious starting point would be in the vicinity of extreme astrophysics.... By Paul Gilster.

A close examination of the Voyager Golden Records reveals the one flaw behind all attempts to bottle history: humans. By Cara Giaimo.

When twelve men gathered at the Green Bank Observatory in West Virginia to discuss the art and science of alien hunting in 1961, the Order of the Dolphin was born… By Daniel Oberhaus.

A former analyst with the US Department of Defence is on the trail of an astronomical ‘cold case’ – an unexplained signal that some believe could have come from extraterrestrials