Inside the Winter Den: We peer quietly into the heart of a snow-covered hillside, where time seems to pause. A mother black bear lies curled...

Inside the Winter Den: We peer quietly into the heart of a snow-covered hillside, where time seems to pause. A mother black bear lies curled up in a hollowed-out den, her breath rising gently in the cold air. Tucked against her warm fur are two tiny cubs, sleeping soundly. The earth walls curve around ...