This undated photo provided by the U.S. National Park Service shows a dead seal found on a beach near Kotzebue, Alaska. Federal marine mammal biologists have declared an "unusual mortality event" over the deaths of ice seals off Alaska's northwest coast. The cause of the deaths is not known. The fisheries arm of the National Oceanic and Atmospheric Administration says the declaration covers ringed, bearded and spotted seals. (Raime Fronstin/National Park Service via AP)
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