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Earthshots: Satellite Images of Environmental Change     Earthshots is a collection of Landsat images and text, designed to show environmental changes and to introduce remote sensing. From the U.S. Geological Survey's EROS Data Center, the world's largest archive of earth science data. From Earthshots: Satellite Images of Environmental Change: Table of Contents http://edcwww.cr.usgs.gov/earthshots/slow/tableofcontents

Global warming     The debate heats up. When the global warming debate first heated up in the late 1980s, scientists warned that the Earth our grandkids walked might be cooking like a fried egg on an El Paso sidewalk. Graphs and recent interpretations of the threat of warming. From The ultimate heating season http://whyfiles.org/080global_warm/

Dusty skies     Blame the wind - and African dust. Hazy skies in Miami may originate thousands of miles to the east - in the drylands of northern Africa, which may supply as much as half of all fine particles in Miami's air during the summer. From A lust for dust http://whyfiles.org/shorties/air_dust.html

Lightning: the Shocking Story     Get the science and the stories behind the bolts that strike our earth a hundred times every second. From Lightning @ nationalgeographic.com http://www.nationalgeographic.com/lightning/index.html

Deserts of Our World     Experience the diversity and cultural richness of the world's deserts, if only virtually. In this special we bring to you a selection of articles, paintings, sculptures, poems and photographs of men and women who have been challenged by the uniqueness of a desert, defeated by its dimensions, rewarded by its remoteness. Site is slow. From OneWorld Magazine: Deserts http://www.oneworldmagazine.org/focus/deserts/

Everest the Search for Mallory and Irvine     Follow an actual expedition to Mt. Everest, and look for evidence that two British climbers could have reached the highest point thirty years prior to Sir Edmund Hillary and Tenzing Norgay, who are known to hold the honor since 1953. Contains narration and interviews with experts. Poorly organized. From NOVA Online | Lost on Everest http://www.pbs.org/wgbh/nova/everest/

Flood!     History of floods caused by major rivers such as Nile, Mississippi, and others. Learn about the Midwestern flood of 1993, the benefits of floods, and more. From NOVA Online | Flood! http://www.pbs.org/wgbh/nova/flood/

Cracking the Ice Age     Ice periods and earth's global warming. Learn how scientists can tell the continents are moving. Limited content. From NOVA Online/Cracking the Ice Age http://www.pbs.org/wgbh/nova/ice/

Deadly Shadow of Vesuvius     Tells the story of the Roman city of Pompeii and the risk that Vesuvius presents today. Learn how volcanologists can predict eruptions. See how a successful large-scale emergency plan was carried out in 1994 eruption of the Rabaul volcano in Papua New Guinea. From NOVA Online | Deadly Shadow of Vesuvius http://www.pbs.org/wgbh/nova/vesuvius/

Atmospheric halos     Simulations of various atmospheric halo displays - Ranging from the familiar circle around the sun or moon to rare and prized events when the whole sky is webbed by intricate arcs. Tiny ice crystals in the atmosphere create halos by refracting and reflecting light. Halos confer a delicate beauty to the skies and they tell us of the crystals inhabiting the clouds. Promotes the HALO simulation software. From Atmospheric Halos http://www.sundog.clara.co.uk/halo/halosim.htm

Beach erosion     Oceans are rising. Beaches are sinking. Any cures in sight? If you need some second-hand boxes, the Cape Hatteras Lighthouse is the place to look. From Disappearing beaches http://whyfiles.org/091beach/

A Paleo Perspective on Global Warming     How paleoclimate research relates to global warming and other important issues regarding climate variability and change. From NOAA Paleo Global Warming Home http://www.ngdc.noaa.gov/paleo/globalwarming/home.html

Avalanche!     Go behind the scenes to see how natural disasters are captured on film. Learn how the movie Avalanche was shot and the elements of an avalanche. From NOVA Online | Avalanche! http://www.pbs.org/wgbh/nova/avalanche/

Tracking El Niño     El Niño information, and practice making the Earth's Weather by participating in an interactive activity. Very engaging graphics. From NOVA Online | Tracking El Niño http://www.pbs.org/wgbh/nova/elnino/