The Dom'Kavash are a mysterious race existent around the post-Cretaceous period who were apparently responsible for the majority of the alien artifacts and for the existence of the Nomads in the Sirius sector (and, presumably in the other sections of their vast empire). Nothing is known about their physiology, and little more is known about their culture. They mysteriously disappeared millions of years before mankind evolved for unknown reasons, leaving behind only Artifacts (sometimes marked with curious xenoglyphics), some ruins, and the Nomads to mark their passing.