Petroglyphs of California's Northern Sierra Nevada by Bill Drake and Nolan Smith
19:35
Hidden Cave
25:09
The Virginia Indians: Meet the Tribes
22:24
Ancient Native American Salt Basins, Sierra Nevada Mountains, California
57:43
Rock Art of the Altai Mountains, Mongolia by Esther Jacobson-Tepfer
1:21:54
Rediscovering the Fremont Through Data-Driven Examination of Rock Imagery by Elizabeth Hora
57:17
Ancient Rivers of the Pacific Northwest
10:07
Mysterious Pictographs of the Southwest
20:49