As far as we can tell, we're alone. But it could be that we're looking in the wrong places.
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.
The U.K.'s Ministry of Defense announced that it will soon release formerly classified government files about UFO encounters.
Anthropologist reveals a potentially big flaw in the Search for Extraterrestrial Intelligence (SETI).
The great distances covered by visiting "aliens" may be ones of time rather than space, a recent book argues.
The US Navy confirmed they have secret, classified documents regarding a 2004 UFO encounter, but releasing them could 'gravely damage' national security.
A private UFO enthusiast has donated his collection of 30,000 documents to the University of Manitoba in Canada. The truth is in there.
Is 2020 the celestial payoff year, in which astronomers finally confirm a "technosignature" coming from an advanced alien civilization?
A professor suggests there are insects on Mars, but this questionable claim could hurt the search for life, experts say.
Humans have questions about alien life. But those beings, if they exist, likely have some questions of their own about humans, queries we may want to answer before we find any life beyond Earth.
How long until we find evidence of life beyond Earth? If a panel of experts is on track with their estimates, it may be sooner than you think.
At a recent event in Boca Chica, Texas, SpaceX CEO Elon Musk confirms that, to his knowledge, we haven't yet discovered aliens.
The moon's surface could act as a fishing net for extraterrestrial life, preserving the remains of organisms or even technology from beyond our solar system.
Mysterious objects trapped in Earth's orbit could be a place to look for alien surveillance technology.
If life evolved the same way elsewhere in the cosmos as it did on our planet, could we find it by the technological traces such civilizations might leave behind?