Elijah Cobb spent five summers on Wyoming’s Wind River Indian Reservation making photographs of Shoshone and Arapaho powwow dancers. His pictures will be on display in the gallery of the Field Museum’s Webber Resource Center for Native Cultures of the Americas through August 23. The exhibit is free with regular museum ad admission: $4 for adults, and $2.50 for students, seniors, and children 3 to 17. Call the museum at 922-9410 for more information.