alieni

Aliens, or alieni in Italian, are beings believed or imagined to originate from worlds beyond Earth. In scientific contexts the term refers to hypothetical life forms that are not native to our planet. In popular culture, aliens appear as characters in stories, films, and art, shaping public interest in space and science.

The Italian term "alieni" is the plural form of "alieno," meaning "foreigner" or "stranger." In Italian as in English, it is used to denote beings from worlds other than Earth, though in practice Italian media often emphasizes science fiction depictions of extraterrestrials.

Scientists have not confirmed the existence of extraterrestrial life. The study focuses on environments where life might exist, such as subsurface oceans on icy moons (Europa, Enceladus), Mars, and exoplanets in habitable zones. Detecting life relies on biosignatures such as atmospheric gases or more ambitious technosignatures that would indicate intelligent activity. The Drake Equation and the Fermi Paradox frame debates about the likelihood and timing of contact.

In culture, aliens are used to explore questions about life, consciousness, ethics, and otherness. They appear as visitors, invaders, or allies, often depicting technological advancement, moral challenges, or social commentary. The trope of humanoid aliens is common, as is the idea of contact through signals, abductions, or peaceful exchange. These stories influence real-world views on space exploration and policy.

Beyond fiction, discussions about "alieni" touch on planetary protection, biosecurity, and international space law, addressing how humanity should explore other worlds while avoiding contamination of planets or Earth, and how any potential contact would be governed.