Even in the face of bitter cold and mounting snow, the Alaska Zoo remains open - and its animals are as happy as ever.

Along a remote stretch of the Alaskan coast, gray wolves have quietly rewritten the rules of what a top land predator eats.

Scientists show that wolves that are eating sea otters in Alaska have much higher concentrations of mercury than those eating other prey such as deer and moose. In late 2020, a female coastal wolf ...