Aliens can refer to everything from little green men in the sci-fi realm to microscopic life forms beyond Earth. For all these possibilities, Live Science has you covered. We break down the latest discoveries that hint at life on other planets and the state of scientific searches for such extraterrestrial life. Sometimes, we may dissect a "little green man" sighting as well.
Latest about Extraterrestrial Life
Does alien life need a planet to survive? Scientists propose intriguing possibility
While such organisms may or may not exist in the universe, the research has important implications for future human endeavors in space.
Father-daughter team decodes 'alien signal' from Mars that stumped the world for a year
A father and daughter team based in the U.S. have decoded a mock "alien signal" beamed from ESA's ExoMars Trace Gas Orbiter a year ago — but the meaning of the extraterrestrial message remains a mystery.
Alien civilizations are probably killing themselves from climate change, bleak study suggests
Astrophysicists estimate that any exponentially growing technological civilization has only 1,000 years until its planet will be too hot to support life.
'Space trash' will lead us to intelligent aliens, Harvard astrophysicist Avi Loeb says
The long-sought evidence of alien life could be lurking in Earth's oceans, says Harvard astrophysicist Avi Loeb. Here is his plan to find it.
Infamous 'Wow! signal' that hinted at aliens may actually be an exceptionally rare cosmic event
The source of a supposed alien broadcast that made researchers go "Wow!" may instead have been the result of a remarkably rare cosmic event, a new study suggests.
SETI searches for alien life in over 1,000 galaxies using unexplored radio frequencies
Although no aliens were found, the results have helped constrain expectations of possible alien transmitter power.
If alien life exists on Europa, we may find it in hydrothermal vents
If there's life on Jupiter's moon Europa or Saturn's moon Enceladus, it could have a network of deep-sea hydrothermal vents to thank for its existence, new research suggests.
7 potential 'alien megastructures' spotted in our galaxy are not what they seem
Scientists recently identified seven stars in the Milky Way that could potentially be gigantic alien structures called Dyson spheres. New research proposes an alternative explanation: Those are just cosmic "hot DOGs" in disguise.
