The history of astronomical discovery shows that many of the most detectable phenomena, especially detection firsts, are not ...

A simulated “alien” signal sent by a Nasa orbiter circling Mars has finally been cracked after months by a father-daughter duo, revealing the cosmic coded message. Nasa collaborated with SETI ...

Humans have wondered for centuries whether we are alone in the universe — and a new study suggests that if alien ...

These findings suggest that the absence of past detections does not mean discovery is imminent. If extraterrestrial ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. If Earth’s ...

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has ...

Telescopes on Earth have found evidence of intelligent alien life and the proof will be released in less than one month, a filmmaker claims. Simon Holland, who has worked on documentaries for the BBC ...

Scientists think they might have found an explanation for the “wow” signal that has long led to hopes it was contact from aliens. In August, 1977, the Big Ear radio telescope at Ohio State University ...

Ever since the bombshell exposé about the US Government’s UFO research program in 2017, the subject of extraterrestrial visitors has moved steadily from the conspiracy world into the mainstream. In ...

Related video: What If We Discovered Alien AI? Nasa collaborated with SETI Institute and media artist Daniela de Paulis on a project to simulate sending an alien message to Earth to observe how humans ...

Ever since the bombshell exposé about the US Government’s UFO research program in 2017, the subject of extraterrestrial visitors has moved steadily from the conspiracy world into the mainstream. In ...