The morning after a fresh snowfall, you’ve probably once walked out of your home and spotted paw prints meandering around ...

To collect e-DNA from wild polar bears in northern Alaska, we sampled the upper layer of snow (~1 cm) from their footprints. The snow was thawed and filtered to capture DNA—in the form of epidermal ...

When a light snow blankets the ground, conditions are perfect for picking up the prints of traveling animals, said Newport ...