The reason we haven’t heard from aliens could be remarkably simple: interstellar communication is hard, and turbulent plasma emitted by stars makes it harder. A new study proposes that when listening ...

In 1967, astronomers thought they had finally heard from the neighbors. They intercepted a signal so regular and precise it seemed impossible for it to be natural. But the excitement didn’t last.

Humans should look to planetary alignments outside of the solar system when searching for signatures of extraterrestrial communications, scientists say. The nascent search for radio transmissions from ...