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 ...

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.

In the 2016 movie Arrival, water-dwelling extraterrestrials make an appearance on Earth. The main human character’s job is to learn how to communicate with the seven-tentacled extraterrestrials before ...