Yellowstone National Park

HELENA, Mont. (AP) | Scientists searching for Yellowstone National Park's lesser-known life-forms -- beyond its famed bison, bears and wolves -- found more than 1,200 species, including several not known to exist in the park. A one-day study of the park in late August found microscopic worms, mushrooms, a bluish-green lichen, a slender grass and a colorful tiger beetle, among other creatures, in about two square miles of Yellowstone, according...