On the Great Lakes, waves build without warning and water churns with a cold, erratic energy. Waves are steep and packed close.

Light from the rising sun illuminates sea smoke as it rolls under the Aerial Lift Bridge in Duluth on a freezing Thursday morning, Dec. 4.

More than 60 years after invasive sea lamprey began decimating Lake Superior lake trout, restoration efforts have successfully returned this native freshwater fish to the lake. Both a keystone species ...