Egypt in the Grand Canyon? It all started in 1909, when purported Smithsonian Institution explorer G.E. Kincaid discovered strange caverns during an expedition directed by Smithsonian anthropologist S.A. Jordan.

In the center cavern like spokes on a wheel, were full of artifacts, including statues, copper weapons, even granaries full of seeds. Its size indicated that 50,000 people could live inside comfortably.

But even more amazingly, the artifacts didn't match up to anything in the known record. Rather than appearing to be of Native American origin, as one might expect, the objects had distinct Egyptian or Tibetan designs.

Could there actually have been an entire civilization of Egyptians living there? If so, how did they get there?