: In a legal context, an alien is a person in a country who is not a citizen of that country.
: 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 : In a legal context, an alien is
: Modern astronomers use telescopes to scan the atmospheres of distant planets for "biosignatures"—gases like oxygen and methane that might indicate life. : In a legal context
Outside of space, "alien" has a specific legal meaning regarding human movement and national borders. : In a legal context, an alien is