Some think it could be an extraterrestrial spacecraft — but is it?
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.
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?
Presidential candidate Bernie Sanders (D-VT) says he's prepared to disclose government information about UFOs if he wins in 2020.
The search for intelligent aliens has time and again come up empty. Perhaps that means they aren't out there.
Are aliens using super powerful flashlights to get our attention? Astronomers think there's a chance they are.
What started as an internet joke has generated a stern military warning after more than a million people "signed up" to "raid" Area 51.
The moon may be dead, but the Apollo 11 astronauts still managed to bring extraterrestrial life back to Earth. Astronomer/alien hunter Seth Shostak explains.
More than 200,000 Facebook users say they're interested in joining a raid on Nevada's infamous Area 51 air base this summer.
Simple chemical reactions on hydrothermal vents could power life on dark worlds like Saturn’s world, Enceladus.
The UFO-investigating group MUFON turns 50 next month. What have we learned over the past five decades?
Certain conditions that nurture life deep underwater may also be found elsewhere in the solar system.
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