From Mike Wall at Space.com:
A strange radio signal that seemed to emanate from a small nearby star probably came from Earth-orbiting satellites, astronomers say.
Late last week, researchers announced that, on May 12, the 1,000-foot-wide (305 meters) Arecibo radio telescope in Puerto Rico detected a bizarre radio signal in the vicinity of Ross 128, a red dwarf star that lies just 11 light-years from Earth.
The signal was theoretically consistent with a transmission from an alien civilization, the astronomers said, though they stressed that hypothesis was “at the bottom of many other explanations.” More.
Coffee: Not really. Psychologically, aliens were at the top of the list. And they are much more fun than any other explanation even if they don’t exist.
See also: How do we grapple with the idea that ET might not be out there?