NASA drone ditches chase plane in milestone flight
This was the first flight of a remotely-piloted aircraft with airborne detect and avoid technology capable of meeting all of the FAA's "see and avoid" rules
Astronomers suggest shooting a laser into space to attract aliens to Earth like a “porch light”
Existing technology could be used to produce an infrared beam bright enough to be spotted by intelligent alien civilizations
Oumuamua: Asteroid that flew past Earth could have been a spacecraft sailing past us, Harvard scientists suggest
"A more exotic scenario is that 'Oumuamua' may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization"
