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...

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...