Structures like Pumu Puku, Machu Picchu, Ġgantija, Newgrange, Baalbek, Nan Madol, the Xi'an pyramid in China and the Giza pyramids, along with countless others, absolutely defy modern views on history and technology. Anomalous artifacts from the Klerksdorp Spheres to the Antikythera mechanism shred those same modern views. But, could it be ancient aliens? Or, as ancient human theorists believe, could it be humans or a parallel human civilization?