who is an alien

👽 The word *alien* can mean different things depending on the context:

### 🌌 In Science and Space
An **alien** (or **extraterrestrial being**) refers to **life that originates outside Earth**. This could be:
– Microbial life on Mars
– Intelligent civilizations on distant exoplanets
– Hypothetical beings imagined in science fiction

So far, **no confirmed evidence** of alien life has been found, but scientists—especially in fields like **astrobiology**—are actively searching for signs of life beyond Earth.

### 🌍 In Legal or Social Terms
In legal language, an **alien** can also mean:
– A **foreign national**—someone who is not a citizen of the country they are currently in.
For example, someone from India living in the U.S. without citizenship might be called a “resident alien” or “non-resident alien” in legal documents.

### 🎬 In Pop Culture
Aliens are often portrayed in movies and books as:
– Green-skinned beings with big eyes
– Advanced civilizations with spaceships
– Mysterious or even hostile visitors (like in the movie *Alien*)