Documents suggest that in more than 80 U.S. locations, the failure of an aging dam could flood a major toxic waste site.
Michigan
Posted inEditors' Vox
Airborne Fireball
A surprise sighting of a meteor in the sky above southeast Michigan.
Posted inNews
Miners Left a Pollution Trail in the Great Lakes 6000 Years Ago
Scientists find evidence of ancient copper mining in polluted lake sediments from Isle Royale National Park.