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Welcome to the collection of definitions dedicated to aliens — mysterious and intriguing beings who, according to numerous theories and studies, originate from extraterrestrial worlds. Aliens are often regarded as intelligent life forms residing beyond Earth, representing a wide range of biological, technological, or entirely unusual manifestations of living matter in the universe.

In the context of scientific and cultural representations, aliens can have diverse physical characteristics: from humanoid forms with human features to radically different biological structures adapted to life in various cosmic conditions. Their appearance and traits are often linked to the conditions of the planets or celestial bodies where they supposedly inhabit — for example, differences in gravity, atmosphere, temperature, and chemical environment lead to diverse adaptations and morphologies.

Aliens are also frequently considered in the context of possible interactions with Earth and humanity — whether through encounters, exchange of information, or technological achievements. Their presence in our system or visits to Earth may be accompanied by environmental phenomena: the presence of spacecraft, landing traces, changes in ecosystems, or influences on local populations and culture.

The study of aliens includes questions of biology beyond Earth, astrobiology, technology, as well as socio-cultural aspects of possible contact. This concept covers many fields of research and imagination, from hypothetical models of life beyond Earth to modern searches for signals and traces of their existence.

Our collection of definitions and materials about aliens offers a comprehensive view of this concept, encompassing various theories of origin, descriptions of possible forms and habitats, as well as reflecting their role in contemporary scientific and cultural contexts.

aliens

Aliens Taking a Selfie in a Modern Interior

Two aliens posing for a selfie against a modern wall

Aliens Taking a Selfie with a Smartphone