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Topic description:
Hard sci-fi is a branch of science fiction built strictly on real scientific laws and theories. Technological and physical plausibility matter greatly; speculation goes only as far as scientific frameworks allow. In these stories details have stakes: how a theory or device works can be central to the plot. Readers and viewers get not only adventure but a logically constructed imagined future.

Category description:
Aliens and UFOs explore the possibility of extraterrestrial intelligent life, including imagined civilizations, encounters, sightings, and stories of invasion or first contact. The topic is both scientific and cultural: what would it mean if we were not alone? In fiction it often becomes a metaphor for fear, hope, or humanity's place in the cosmos.

Aliens & UFOs category
The Enigmatic El Ojo: A Mysterious Circular Island in Argentina
Aliens & UFOs
The Enigmatic El Ojo: A Mysterious Circular Island in Argentina
Astrobiologists Weigh In on the Possibility of Extraterrestrial Life
Aliens & UFOs
Astrobiologists Weigh In on the Possibility of Extraterrestrial Life
Are Alien Signals Lurking Beyond the Known Radio Spectrum?
Aliens & UFOs
Are Alien Signals Lurking Beyond the Known Radio Spectrum?
Human Neurons Show Surprising Computational Power
Aliens & UFOs
Human Neurons Show Surprising Computational Power