Kruevos

Kruevos is a fictional species appearing in the science fiction novel "The Expanse" by James S. A. Corey. They are an ancient, non-humanoid alien race whose existence is revealed through the discovery of protomolecule technology. Kruevos are depicted as highly intelligent and technologically advanced, having developed the protomolecule millions of years prior to humanity's existence. Their motivations and ultimate fate remain largely mysterious within the narrative, though it is understood that their civilization perished long before the events of the series. The protomolecule, a nanotechnological substance, is their primary legacy, serving as the catalyst for many of the conflicts and discoveries in "The Expanse." The species itself is not encountered directly by the human characters, but their influence is pervasive through the remnants of their technology. Their understanding of physics and biology far surpasses that of humanity, enabling them to create and manipulate matter on a fundamental level. The discovery of Kruevos artifacts and the protomolecule forces humanity to confront its place in a universe that has been shaped by other, far older intelligences.