Alien Definition & Meaning - Merriam-Webster
网页The meaning of ALIEN is belonging or relating to another person, place, or thing : strange. How to use alien in a sentence. Synonym Discussion of Alien.
9 things we learned about aliens in 2021 - Live Science
网页2021年12月28日 · A bombshell UFO report, the "alien junk" in our solar system, and more new clues about extraterrestrial life.
Extraterrestrial life - Wikipedia
网页Extraterrestrial life, alien life, or colloquially aliens, is life which does not originate from Earth. No extraterrestrial life has yet been conclusively detected.
Do Aliens Exist? We Asked a NASA Scientist: Episode 5
网页2021年9月10日 · Do aliens exist? Extraterrestrial life has never been discovered, but that doesn’t mean it doesn’t exist. At NASA, astrobiologists like Lindsay Hays are trying to answer one of the most profound questions ever: Is there life beyond Earth?
What's the best evidence we've found for alien life?
网页2023年10月28日 · SETI searches for alien life in over 1,000 galaxies using unexplored radio frequencies
How UFO Sightings Went From Conspiracy Theory To A Serious ... - NPR
网页2021年6月4日 · Have alien spacecraft been buzzing across Earth's skies? Turns out it's not just people in tinfoil hats asking that question — it's the U.S. government.
ALIEN Definition & Meaning | Dictionary.com
网页noun. a person owing allegiance to a country other than that in which he lives; foreigner. any being or thing foreign to the environment in which it now exists. (in science fiction) a …
What we actually know about aliens, according to science
网页2023年11月25日 · Aliens are having a moment. But the evidence says all possibilities remain in play, including the possibility that we are alone.
ALIEN | definition in the Cambridge English Dictionary
网页ALIEN meaning: 1. relating to creatures from another planet: 2. strange and not familiar: 3. coming from a…. Learn more.
alien | Wex | US Law | LII / Legal Information Institute
网页According to the Immigration and Nationality Act (INA), an alien is an individual who does not have U.S. citizenship and is not a U.S. national. The INA defines a national of the United States as one who, while not a citizen, owes permanent allegiance to …
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