Alien ⚡
Outside of space, "alien" has a specific legal meaning regarding human movement and national borders.
: 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". Outside of space, "alien" has a specific legal
: 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. Outside of space
: Modern astronomers use telescopes to scan the atmospheres of distant planets for "biosignatures"—gases like oxygen and methane that might indicate life. their constitutional status changes
