There are portals within many national forests that offer entry into realms of the most curious forms of biodiversity. These underground chambers and hallways are called lava tubes or caves. In these landscapes below the ground, tiny creatures creep in the shadows in costumes of faded hues. Their pallor is paired with neighboring life forms that sparkle when hit by a flashlight, as if dusted with glitter. And these subterranean spaces are also archives that contain records of our Paleolithic and climatic past. To explore within, a readiness for crawling will be required. Fortunately, we have an experienced caver to show us the way.

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The gray wolf (Canis lupus) became extirpated, or locally extinct, in California in the 1920s. But this large member of the dog family was once a native species in California that ranged widely here and throughout much of the United States. In recent years, gray wolves have been returning to California. Their slow comeback is a natural progression of population growth happening in others western states. Wildlife specialists with the USDA Forest Service and the California Department of Fish and Wildlife are working together to monitor and conserve this recovering species by looking for signs of their whereabouts with boots on the ground, satellite collars, and DNA analysis.

The Pacific Southwest Research Station is part of the Forest Service's research and development organization. R&D employs more than 500 scientists as well as several hundred technical and support personnel located at 67 sites throughout the U.S. In this episode, we focus on three employees to share who they are and what they do at the station.