On the forested mountain slopes of the Basque country, we follow two Spanish biologists on the track of a pair of secretive mammals. Pine and stone martens are elusive carnivores that make their homes among the moss-covered, ancient oaks, leaving few clues to their presence. Determining just how changes to the forest are affecting the two species requires some scientific detective work—and the willingness to gather some rather smelly data. Photo Credit: Martes martes, SD Lund, BioPix read moreDuration: 5:48Published: Mon, 03 Oct 2011 14:19:34 +0000