Extraterrestrial life, or alien life (colloquially aliens), is life that originates from another world rather than on Earth. No extraterrestrial life has yet been scientifically or conclusively detected.

3 days ago · A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of interest using the world's largest radio telescope.

3 days ago · Is 3I/ATLAS an alien spaceship? Scientists disprove extraterrestrial conspiracy The strange outsider's jaunt through Earth's cosmic neighborhood has sparked plenty of …

Dec 30, 2025 · Objects are considered “ unidentified flying objects ” (UFOs) because they are aerial objects or optical phenomena that observers cannot readily identify. These sightings …

Nov 20, 2025 · Hole in the Sky, by Daniel H. Wilson, is one of Scientific American’s best fiction picks of 2025. In the novel, aliens talk through an AI headset and land in the Cherokee Nation, …

Sep 11, 2025 · Forget UFOs and alien abductions, here's how scientists are really looking for life on other worlds.

Jan 19, 2025 · Bottom line: Aliens probably exist according to a survey of more than 1,000 scientists. Nearly 87% of them believe extraterrestrial life exists elsewhere in the universe.

Aug 28, 2025 · Among the most persistent questions that humanity has asked is whether life exists beyond our small blue planet. The word “alien” evokes both fear and fascination, …

Jan 14, 2025 · There is actually a lot of “indirect” or “theoretical” evidence that alien life exists. For example, we do now know that habitable environments are very common in the universe.

List of alleged extraterrestrial beings This is a list of alleged extraterrestrial beings that have been reported in close encounters, claimed or speculated to be associated with unidentified flying …