The Ky'rha Artifacts were a group of artifacts from the ancient Ky'rha civilization that gave the user the ability to time travel.
In 2366, some of these artifacts were discovered by Miliani Langford's archaeological team. One of her associates went back in time and changed history and Langford was forced to correct the timeline. Langford then reported the artifacts to the Department of Temporal Investigations, causing special agents Gariff Lucsly and Marion Dulmur to spend months hunting the artifacts down. (DTI novel: Watching the Clock)