Hidden Thunder: Rock Art of the Upper Midwest mystery We stare at each other

We stare at each other because we don't know which tribe

their ongoing struggles against a centuries-old legacy of colonial disempowerment

fetched up in Gichi Bitobig—a stony harbor now known as Grand Marais

and a design because of what—because of who—is missing

Hidden Thunder: Rock Art of the Upper Midwest mystery We stare at each otherIn Hidden Thunder, renowned watercolor artist Geri Schrab and archaeologist Robert "Ernie" Boszhardt give readers an up close and personal look at rock art. With an eye toward preservation, Schrab and Boszhardt take you with them as they research, document, and interpret at the ancient petroglyphs and pictographs made my Native Americans in past millennia. In addition to publicly accessible sites such as Wisconsin's Roche a Cri State Park and