Rivenas

Rivenas is a fictional planet featured in the science fiction novel "The Last Stand of the Star Titans" by Arthur C. Clarke. The planet serves as the homeworld of a highly advanced, non-humanoid alien species known as the Riven. These beings are characterized by their crystalline physiology and their unique form of consciousness, which is distributed throughout their planet's interconnected geological formations.

The Riven civilization is ancient and possesses technological capabilities far exceeding those of humanity. Their understanding of physics and energy manipulation allows them to interact with the universe on a fundamental level. The narrative of "The Last Stand of the Star Titans" often explores the philosophical implications of encountering such an alien intelligence and the challenges of interspecies communication.

Rivenas itself is depicted as a world of immense geological complexity, with vast underground networks and crystalline structures that are integral to the Riven's existence. The planet is a self-sustaining ecosystem, powered by exotic energy sources that the Riven have mastered. The Riven society is not hierarchical in a human sense; their consciousness is collective, leading to a unified and deliberate approach to their interactions with other species and the cosmos at large. The novel uses Rivenas as a backdrop to examine themes of sentience, evolution, and humanity's place in the vastness of space.