Robert Milton Schoch is an American associate professor of Natural Sciences at the College of General Studies, Boston University. Following initial work as a vertebrate paleontologist, Schoch co-authored and expanded the fringe Sphinx water erosion hypothesis since 1990, and is the author of several pseudohistorical and pseudoscientific books.

The Yonaguni Monument , also known as "Yonaguni (Island) Submarine Ruins" , is a submerged rock formation off the coast of Yonaguni, the southernmost of the Ryukyu Islands, in Japan. It lies approximately 100 kilometres east of Taiwan.