Figure 2.25: Two polygonal folk houses. (a) Buriat Mongol yurt in southern Siberia, near Lake Baikal. (b) Navajo hogan in New Mexico. The two dwellings, almost identical and each built of notched logs, lie on opposite sides of the world, among unrelated folk groups who never had contact with each other. Such houses do not occur anywhere in between.
(a: Courtesy of Terry G. Jordan-Bychkov; b: Number 7/Alamy.)