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Animal hospital     Many a pet's life ends simply because inappropriate behavior leads the owner to "put the animal to sleep." On this Web site you can find out more about the problem, review questions and answers with specialized animal behaviorists, and test your knowledge of more exotic animals. Information is communicated in text narrative form, and in the form of question and answer. Limited content. From NOVA Online | Animal Hospital http://www.pbs.org/wgbh/nova/vets/

Running on empty     Too few fish. Too little chocolate. To blame: a soaring population and booming economy? From Less is less http://whyfiles.org/066shortages/

American Indians and the Natural World     Through exploration of four different visions of living in and with the natural world - those of the Tlingit of the Northwest Coast, the Hopi of the Southwest, the Iroquois of the Northeast, and the Lakota of the Plains - North, South, East, West: American Indians and the Natural World examines the belief systems, philosophies, and practical knowledge that guide Indian peoples. From American Indians and the Natural World http://www.carnegiemuseums.org/cmnh/exhibits/north-south-east-west/

Habitats: the Growth of Forests     Deep in the Monongahela National Forest of West Virginia, an experiment unfolds. The United States Forest Service has set aside four plots in the woods for study. Each shows a forest at a different stage of growth: 2 years, 12 years, 41 years, and about 86 years. Together the plots demonstrate natural succession: the process by which a forest evolves. From Habitats @ nationalgeographic.com http://www.nationalgeographic.com/habitats/index3.html

River Wild: Running the Selway     Join us for a wet and wild ride down the white water of Idaho's Selway River. Choose a boat, learn how to read and run rapids, listen to a thrush's song and an eagle's call, find out how to take great white-water pictures and more. From The River Wild: Running the Selway @ nationalgeographic.com http://www.nationalgeographic.com/selway/index.html

Fallout: Eye on the Volcano     Eruptions from a crater that suddenly reawakened in 1995, after centuries, have tormented the tiny Caribbean island of Montserrat for almost three years. Find out how planetary forces laid the groundwork for the eruption, how the toxic fallout affected the island's population and what it has been like living with the fallout of the volcano. From Fallout @ nationalgeographic.com http://www.nationalgeographic.com/volcanoes/index.html

Hawaii: Born of Fire     Be next to an active volcano. Also learn what makes Hawaii a place where exists such a tremendous number of species. From NOVA Online/Hawaii- Born of Fire http://www.pbs.org/wgbh/nova/hawaii/

Savage earth     Earthquakes, volcanoes, tsunamis, and other natural disasters. Highlights include animated illustrations, original articles and sidebars, Ask the Experts, photos, and video downloads. Companion site for TV show. From SAVAGE EARTH Online http://www.pbs.org/wnet/savageearth/

Alaska: The Great Land     Alaska's land, wildlife, history, and people. Photographs of Kodiak Island's Chiniak Bay and of totem pole by George F. Mobley. Encounter singing giants, North America's largest land predator, and more - including a guide to where the wild things are. As geographer Henry Gannett, a founder of the National Geographic Society, predicted in 1904, Alaska's "grandeur is more valuable than the gold or the fish or the timber, for it will never be exhausted. From Alaska: The Great Land @ nationalgeographic.com http://www.nationalgeographic.com/greatland/

Solar Max 2000     Discussion and images detailing the effects of the solar maximum, that part of the sunspot cycle when there will be maximum activity.Ê The year 2000, it isÊ believed, will be the solar maximum for theÊ current solar cycle. From http://www.exploratorium.edu/solarmax/index.html

Auroras 2000     Images of current auroral activity, news and information about Auroras, links elsewhere. From http://www.exploratorium.edu/auroras/index.html

Winter Storms     Some of the critical factors that cause Winter storms. From "Dr. Dewpoint" series. Brief article. In the winter season, storms move along the edge of polar air masses and bring a variety of precipitation types. A band of heavy snow often occurs within stronger storms. One of the biggest challenges for forecasters is determining exactly where that band will be during an upcoming event. From http://www.intellicast.com/DrDewpoint/Library/1185/

The Wind... Air in motion     Succinct primer on the causes and characteristics of wind. From "Dr. Dewpoint" series. Brief article. Wind is literally air in motion. Because air is free to move, it very readily reacts to forces exerted upon it. The primary driving force for the wind is a difference in atmospheric pressure along a horizontal surface. From http://www.intellicast.com/DrDewpoint/wx101/1099Wind/

All about clouds     Succinct primer about clouds. What clouds are all about is water. They are visible collections of tiny water droplets and/or ice crystals (frozen water). From cloud, rain and snow fall. From http://www.intellicast.com/DrDewpoint/wx101/0599Clouds/

Guided Tour on Wind Energy     Series of brief articles about the causes of wind and how it is harnessed to produce wind power. Sources of wind energy, design and operation of turbines, new research, history, and economics. From http://www.windpower.dk/tour/index.htm

Geologic time scale     Navigable sections on stratigraphy with information about deposition, nomenclature, and strata identification; ancient life with an overview of major biological events, including origin and extinction of important groups; localities with resources about particular fossil localities, and tectonics which discusses continental migrations, changes in global circulation, and climate change. From http://www.ucmp.berkeley.edu/help/timeform.html

The extinction files     Cycle of mass extinctions, from Late Cambrian to the Pleistocene; notable organisms that have become extinct, from Ammonites to T-Rex; extinction theories, and a glossary. Extinction is, quite literally, the end of a particular evolutionary line, the end of a species, a family, or a larger group of organisms. From http://www.bbc.co.uk/education/darwin/exfiles/index.htm

Arctic Climatology and Meteorology Primer     Arctic weather and the factors that determine weather and climate. Includes a gallery and a glossary of meteorological terms. The Arctic consists of ocean surrounded by continental land masses and islands. The central Arctic Ocean is ice-covered year-round, and snow and ice are present on land for most of the year. From http://nsidc.org/arcticmet/index.html

Snow Crystals     All about snow crystals and snowflakes. Early snow crystal observations and includes photo collections, snow crystal classifications, "designer snowflakes" grown in a laboratory, as well as a snow crystal primer. From http://www.its.caltech.edu/%7Eatomic/snowcrystals/

Microscopic views of snow crytals     Images obtained using a low temperature scanning electron microscope in support of agricultural research projects. From http://www.lpsi.barc.usda.gov/emusnow/

Photographs of snowflakes by Wilson Bentley     Photo gallery. "Under the microscope, I found that snowflakes were miracles of beauty; and it seemed a shame that this beauty should not be seen and appreciated by others. Every crystal was a masterpiece of design and no one design was ever repeated., When a snowflake melted, that design was forever lost. Just that much beauty was gone, without leaving any record behind." by Wilson "Snowflake" Bentley 1925 From http://snowflakebentley.com/snowflakes.htm

Deserts: Geology and resources     About deserts, how the atmosphere influences aridity, where deserts form, types of deserts and their features. Approximately one-third of the Earth's land surface is desert, arid land with meager rainfall that supports only sparse vegetation and a limited population of people and animals. From http://pubs.usgs.gov/gip/deserts/contents/

A History of American Agriculture 1776-1990     Sparsely illustrated timelines on aspects of American farming. Economic cycles, the land, machinery, trade, politics. Navigational links on bottom of page. From http://www.usda.gov/history2/text1.htm

Transgenic crops     Balanced information and links to other resources on the technology and issues surrounding transgenic crops (also known as genetically modified or GM crops). From http://www.colostate.edu/programs/lifesciences/TransgenicCrops/

Water on Tap     A Consumer's Guide to the Nation's Drinking Water. The quality of U.S. drinking water safety, and addresses a variety of concerns that apply to many regions and situations. From http://www.epa.gov/safewater/wot/ontap.html

Fuel Economy     Compare fuel economy for different autos and trucks, get fuel economy tips, and find out why fuel economy is important. From http://www.fueleconomy.gov/

Rivers     What are headwaters? A river begins at its headwaters, a network of small upstream tributaries. River facts, riparian areas, instream flow, conservation advocasy. From http://www.amrivers.org/aboutrivers/headwaters.htm

Earth from Above.     Fascinating and beautiful views of the earth, from a book by Yann Arthus-Bertrand. Images exist for all sorts of physical and cultural phenomena, especially agriculture.Ê Choose images by geographic locale or from an index.Ê Animated clips and screensavers available. Uses Macromedia Flash. Audio. From http://home.fujifilm.com/efa/

American Slave Narratives     Series of narratives. From 1936 to 1938, over 2,300 former slaves from across the American South were interviewed by writers and journalists under the aegis of the Works Progress Administration. These former slaves, most born in the last years of the slave regime or during the Civil War, provided first-hand accounts of their experiences on plantations, in cities, and on small farms. Their narratives remain a peerless resource for understanding the lives of America's four million slaves. From http://xroads.virginia.edu/~hyper/wpa/index.html

Beauty and hygiene advertisements     Extensive archive and brief history of ads (1911 - 1956) for cosmetics, soaps, and shaving supplies that were targeted for personal hygiene and enhancing one's attractiveness. Over 2000 ads. Click "Browse this category" for the catalog. The alteration of appearance through the use of cosmetics has been a practice for thousands of years. From http://scriptorium.lib.duke.edu/adaccess/cosmetics-history.html

Radio advertisements     Extensive archive and brief history of ads (1922 - 1956) for radios, radio parts, and radio programs . Also included are a small number of miscellaneous electronic products, such as hearing aids, telephones, etc. Over 1000 ads. From http://scriptorium.lib.duke.edu/adaccess/radio-history.html

Television advertisements     Extensive archive and brief history of ads (1939 - 1957) for television sets, as well as a few other miscellaneous electronics, are included in this category. An interesting feature of many of these ads is their promotion of individual television programs. Television technology was actually first developed in the 19th century, before commercial radio was conceived of, when, in 1897, Ferdinand Braun invented the cathode ray tube. Over 800 ads. From http://scriptorium.lib.duke.edu/adaccess/tv-history.html

Transportation advertisements     Extensive archive and brief history of ads (1938 - 1957) for the many modes of mass transportation available during the first half of the twentieth century - airlines, rental cars, buses, trains and ships. Over 2600 ads. From http://scriptorium.lib.duke.edu/adaccess/trans-history.html

World War II advertisements     Extensive archive and brief history of ads (1942 - 1945) for ads sponsored by the U.S. Government or ads paid for by businesses in support of Government-sponsored campaigns, such as V-mail, or bond drives. Charged with the task of selling wartime government programs and war bonds to the American public, the War Advertising Council and the War Finance Committee sought to promote voluntary compliance with bond buying quotas and rationing programs while at the same time contributing to the home-front morale. Over 400 ads. From http://scriptorium.lib.duke.edu/adaccess/wwad-history.html

Frogs     Frogs: their anatomy, habitats, eating patterns, courtship. Few people realize just how ancient frogs are. For 190 million years, the ancestors of modern frogs have roamed (if not ruled) the earth, looking much the same as they do today. From Exploratorium: Frogs http://www.exploratorium.edu/frogs/