This is a collection of high-quality photographs of Mars, showing evidence of water. Each photo is available in multiple versions, and is accompanied by a detailed description of what it illustrates. Full description.

This website features the most complete set of astronaut photography of Earth from the beginning of human spaceflight in the 1960s to the digital photographs being downlinked daily from the International Space Station. The underlying database includes over 430,000 records in 2002, with new data added daily. The pages are maintained by the data source at NASA's Johnson Space Center and include search ... Full description.

This site presents a take-home web-based project for introductory geology students. The exercise has the students interpreting the sedimentary geology (lithology and fossils) of the Grand Canyon to create a geological history for the region. It is an open-ended exercise with no absolutely correct answer; it involves students acting as scientists - that is, the way real scientists think and combine ... Full description.

The Global Climate Animations site contains animations of the Earth's climate system for educational and research purposes. The animations show the climatology of the seasonal cycle for selected climate variables for the time period 1959-1997, based on data from the NCEP/NCAR 40-Year Reanalysis Project. The individual frames in each animation show the map pattern of the long-term monthly averages ... Full description.

Earth and all the other planets and moons of our Solar System have been continuously pelted by asteroids and comets ever since their formation. On Earth, wind and water have eroded away most of the evidence; various other geologic processes have concealed it; oceans and vegetation now cover much of the rest. This activity will help your students understand how NASA scientists are discovering evidence ... Full description.

In this investigation, students examine Monterey Bay National Marine Sanctuary. After becoming familiar with a bathymetric/topographic map of the area, students select a transect along the seafloor to study some of the geological, biological, and physical features that are present. In this activity students use a bathymetric/topographic map as a tool for recognizing geobiological features of the sanctuary, ... Full description.

Window To My Environment (WME) is a web-based tool that provides access to a wide range of federal, state, and local information about environmental conditions and features in an area of your choice. By entering your zip code or city/town and state WME will provide an interactive map that shows the location of regulated facilities, monitoring sites, water bodies, population density, and perspective ... Full description.

Researchers have identified approximately 140 individual impact craters on Earth. These craters probably represent only about 25 percent of those to be found. Assuming an equal rate of impact around the globe, many more craters remain to be discovered, particularly in remote land regions of our planet and in the oceans. This activity uses satellite images of several craters on the earth to study impact ... Full description.

Students will utilize the Internet to take a virtual field trip to visit a glacier and discover what physical effects glaciers have on the land. They will also have the opportunity to virtually visit Vermont and trace the pictorial history of how a whale's fossils were found there. The site also contains a student worksheet for their visual field trip. The site also provides an explanation of the ... Full description.

Signals of Spring is a web-based professional development package that provides training for teachers and integrated science curricular materials including data interpretation and applications for teachers and students. Students in expert teams work collaboratively and use NASA and other satellite earth imagery to explain the migration of land and marine animals tracked by satellites. Remote sensing ... Full description.