What s so great about the Great Lakes Cheri Dobbs and Jennifer Gabrys

View full lesson: The North American Great Lakes Huron, Ontario, Michigan, Erie, and Superior are so big that they border 8 states and contain 23 quadrillion liters of water. They span forest, grassland, and wetland habitats, supporting a region thats home to 3, 500 species. But how did such a vast and unique geological feature come to be Cheri Dobbs and Jennifer Gabrys takes us all the way back to the Ice