A set of footprints impressed in clay in the Honseca Cave (Velilla del Río Carrión, Palencia), which were made by cave bears that inhabited this area during the Late Pleistocene, are the subject ...

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 ...