zebra mussels

Washington state to use dog to detect invasive mussels on boatsWashington state to use dog to detect invasive mussels on boats

Washington state to use dog to detect invasive mussels on boats

This photo provided by the U.S. Department of Agriculture shows a group of zebra mussels. Government officials are cracking down…

7 years ago
Lake Superior No Longer the Clearest of the Great LakesLake Superior No Longer the Clearest of the Great Lakes

Lake Superior No Longer the Clearest of the Great Lakes

Photo: Lake Superior, seen from the Park Point beach in Duluth in August. Many people who've spent much time around…

7 years ago