LINKS

Maps:
          Guadalupe Mountains National Park (NPS, zoomable)
          Carlsbad Caverns

National Parks:
          Guadalupe Mountains National Park
          Guadalupe Park administrative history
          Carlsbad Caverns National Park
          National Park Service
          National Park statistics
          PBS / National Parks site


US Geological Survey website:
          The Great Ice Age
          Our Changing Continent
          Past Climate and Vegetation Changes in the Southwest US

Texas Madrone Tree:
          NPS trees page
          Native range distribution maps--USGS atlas, Plantmaps.com
          University of Texas field studies
          US Forest Service data

Bigtooth Maple Tree:
          In Search of Bigtooth (Texas Parks and Wildlife, 2008)
          NPS trees page

Chihuahuan Desert
          Chihuahuan Desert Nature Center

Environment / Global warming / Climate change
          The Copenhagen Diagnosis: Latest climate science update 
          NASA-Global Climate Change
          The EPA (Climate change) 
          NOAA Climate Service
                     NOAA "State of the Climate" summary (released 7-28-10)
          Natural Resources Defense Council
          Climate Central 
                    What You Need to Know: 20 Questions and Answers...
          Environment360
          The Daily Climate
          The heat is online
          The Sierra Club
          E magazine (The Environmental Magazine)