Dr. David Montgomery is a Professor of Geomorphology at the University of Washington. He works to bring the impact of geological processes on human history to a wider audience. Montgomery joins Steve Kraske to explain why dirt is the foundation of civilizations, how we're losing it to erosion, and the lessons geology teaches us.
Two hundred years ago today, a massive earthquake the shook the country stretching from the Missouri Bootheel to as far away as Boston, where ground motion caused church bells to ring. Could it happen again?