What happens when you look at the Lewis and Clark Expedition through the eyes of a geologist? This week, Rebecca and Shannon sit down with John Jengo - professional geologist, Lewis and Clark scholar, and apparently Great Falls superfan (this was his 12th visit, but who's counting). John was in town for the Lewis & Clark Trail Alliance Annual Gathering, and he shares how the landscape, rock formations, and rivers along the expedition's route tell stories most of us have walked right past. From the Missouri River Breaks to the Great Falls of the Missouri, you'll discover why geology played a bigger role in the Corps of Discovery's journey than you might expect. Whether you're a Lewis and Clark enthusiast or just curious about what's hiding beneath your feet, this episode will have you looking at Montana's landscape in a whole new way.