Red Rock Canyon's petroglyphs are the ancient carvings, drawings, and etchings made in the rock by subsequent generations of the area's first human settlers. As many as six different Native American cultures, stretching back to 11,000 BC and including Paleo-Indians, Anasazi, and Southern Paiute, are thought to have inhabited the canyons here. More natural and cultural info on the conservation area can be found at: http://www.blm.gov/nv/st/en/fo/lvfo/blm_programs/blm_special_areas/red_rock_nca.3.html