Hidden Thunder: Rock Art of the Upper Midwest mystery their ongoing struggles against a

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

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

Many Dakota people consider the area to be their sacred place of origin as well as a site of genocide

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

and a response to the art of it all

Hidden Thunder: Rock Art of the Upper Midwest mystery their ongoing struggles against aIn 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