It starts with a signal. Faint, strange, and unlike anything humanity has ever recorded. Within hours, it escalates into an event that changes the course of history as an alien arrival on Earth ...

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 ...

Interstellar comet 3I/ATLAS has become famous than most celebrities as it makes its way through our solar system. Although astronomers have been studying this rare visitor since its discovery in July, ...