Alien -

: Scientists suggest looking at non-human intelligence on Earth—like octopuses, crows, or bees—as a way to prepare for how truly different alien minds might be. 2. Legal and Societal Definitions

Outside of space, "alien" has a specific legal meaning regarding human movement and national borders.

: NASA uses a multi-level scale to verify alien life. Reaching "level seven" would mean ruling out all non-biological explanations and having secondary evidence, like a radio signal. : Scientists suggest looking at non-human intelligence on

ArtI.S8.C18.8.7.2 Aliens in the United States - Constitution Annotated

In science, an "alien" is any organism that did not originate on Earth. : NASA uses a multi-level scale to verify alien life

: In the United States, once an alien gains admission and develops ties, their constitutional status changes, according them a "generous and ascending scale of rights".

: The term is often used metaphorically in literature to describe the feeling of being "not quite one of us" or surviving in a foreign land. 3. Pop Culture and Science Fiction : In the United States, once an alien

The most famous "alien" in the world is the Xenomorph from the 1979 film Alien .