http://www.hcn.org These are the search results for the query, showing results 1 to 2. http://www.hcn.org/issues/341/16861 Quagga mussels – an extraordinarily prolific and costly invasive species – have appeared in Lake Mead, and no one is sure how to keep these unwanted newcomers from infesting the West. No publisher Michelle Nijhuis aquatic Harry Kew Wen ecology Lake St. Clair Ellen Marsden Colorado River biologists Biodiversity Lake Mead National Recreation Area Science exotic species St Las Vegas Boat Harbor Invasive species Paul Hebert Lake Mead zebra mussel Invasive Dreissena Las Vegas Baldwin 2010-08-17T23:00:10Z News Article http://www.hcn.org/issues/331/16606 Cell phones have their uses, but they do not belong in the wilderness No publisher Becky Lomax hiking cell phones backpackers solitude cell phone towers Human Beings and electronic wilderness Nature technology equipment Becky Lomax Yellowstone Communities noise Lake Mead National Recreation Area emergencies sound ma Hiking tent camping quiet wireless companies National Park 2010-10-26T21:59:01Z News Article