Stay curious.
Ask for evidence.
A readable guide to alien life, UFO questions and the enormous distances between worlds.
Our approach
We explain the question before exploring possible answers. We distinguish documented observations from interpretations, and scientific ideas from imaginative speculation.
AliensOnly is an independent educational website. It is not a research institution, an official sighting-reporting service or affiliated with the organisations we reference.
Sources you can follow
Science articles link to their source material. We aim to make uncertainty visible and correct errors when identified. Dates show when a page was prepared or reviewed; they do not turn a historical source into a new finding.
Images with a clear purpose
Our diagrams and decorative artwork explain ideas or set a mood. They are not photographs of alien life or historical UFO events. If we use a reconstruction or generated artwork, we label it. Reused material requires an individual rights check and any necessary attribution.
What If? Science-inspired fiction
Our What If? section contains original fictional scenarios and invented discoveries. Each story is labelled and includes a note explaining its scientific foundation and creative assumptions. Its images depict imagined scenes.
Tools, not predictions
Interactive features show the consequences of stated assumptions. They do not estimate the probability of alien life or establish the cause of a sighting.