Are we alone in the universe? Live Science follows the researchers trying to answer that question and reports on what we've learned about aliens. From how scientists search for extraterrestrial life and whether the U.S. government is hiding evidence of "non-human intelligence" to the strange, scientific excuses for why humans haven't found aliens yet and the disturbing reason why aliens may never have visited Earth, our expert writers and editors tackle it all with the latest news, features and articles about extraterrestrial life.
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Alien life may look nothing like life on Earth — so how should we go about looking for it?
Alien life might look unlike anything we've ever seen on Earth. Trying to find evidence of these unknown organisms will require some creativity.
12 strange reasons humans haven't found alien life yet
Scientists have been searching for evidence of extraterrestrial life for decades. So, where are all the aliens? Here are 12 intriguing theories ...
'It's hard not to believe he saw something': Historian Greg Eghigian on how UFOs took over the world
An artist's impression of UFOs appearing over a small town.
The fastest-moving stars in the galaxy may be piloted by intelligent aliens, new paper suggests
To explore the galaxy and hunt for resources, intelligent aliens might need to turn their home stars into natural spaceships, a new paper suggests. A few known star systems might fit the bill.
UFO whistleblowers tell Congress 'we are not alone in the cosmos'
The latest congressional UFO hearing featured testimony from former military personnel who told representatives that excessive government secrecy hides the fact that we are not alone in the cosmos.
It would be easier to find aliens in a parallel universe than in our own, new multiverse study claims
A new model based on the famous alien-hunting Drake equation suggests that some parallel universes within the hypothetical "multiverse" could have higher chances of containing extraterrestrial life than our universe.
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.
