Do you have an idea for a cutting-edge technology that could protect the environment while promoting economic growth? The U.S. Environmental Protection Agency (EPA) is offering college professors and their students an opportunity to turn ideas into reality through its P3 (People, Prosperity and the Planet) grants competition. EPA's P3 is a student design competition for sustainability that is now in its third year. Previous P3 winners have already taken their innovations to the next level—including starting successful businesses, winning additional awards, and providing environmental solu...

Neutrinos are remarkably elusive subatomic particles, and it takes specially designed and constructed detectors to ensnare them. One such detector is the Soudan Underground Laboratory, built 2,400 feet underground in an old mine in Minnesota. The lab's Web site offers descriptions of the facilities and updates on ongoing experiments. It also has a section for students and teachers, with games, puzzles, and lesson plans for various grade levels.Go to: http://www.soudan.umn.edu/

Produced by WBUR in Boston to accompany a special program on Madagascar, this award-winning Web site offers a remarkably detailed look at life on this island, with a focus on the struggle to preserve Earth's diversity of life. It includes photo galleries, audio clips, videos, maps, and much more.Go to: http://www.wbur.org/special/madagascar/

In the ThinkQuest competition, teams of students from around the world create educational Web sites. Take a look at this year's winners, which feature imaginative and engaging efforts on such topics as avian flu, mathematics history, information inequality in the digital age, minerals and mining, artificial intelligence, and more.Go to: http://www.thinkquest.org/aug05may06/index.shtml

The Exploratorium in San Francisco provides images of a wide range of microscopic critters. The Web site also includes breathtaking movies of sea urchin fertilization, frog development, zebrafish embryo growth, and more.Go to: http://www.exploratorium.edu/imaging_station/

To keep up with the latest rumblings around the globe, the U.S. Geological Service offers a Web site with current earthquake data. The site also includes information about significant earthquakes of the past, megaquakes and Hollywood disaster movies, and a section for kids, which has games, puzzles, science project ideas, and more.Go to: http://earthquake.usgs.gov/

Interested in learning about making and breaking codes? The National Security Agency has created an interactive Web site for kids, allowing them to play games and solve puzzles as they learn about codes, ciphers, cryptology, and more.Go to: http://www.nsa.gov/kids/

This Web site, produced by the Howard Hughes Medical Institute, provides hands-on science activities for elementary-school students. It uses animation, sound, quizzes, and other techniques to encourage kids to explore biology. Activities include building a model of a butterfly emerging from a cocoon and identifying which parts of plants belong in the family salad bowl.Go to: http://www.hhmi.org/coolscience/

What would it be like to orbit a black hole—or even to fall into one? You can find out by exploring the world of black holes in a Web site created by a team at the Space Telescope Science Institute in Baltimore, Md. For a fully interactive multimedia experience, click "Journey to a Black Hole" (fast Internet connection recommended). For an in-depth study of black holes that presents the site's contents conveniently sorted by topic, click "Black Hole Encyclopedia."Go to: http://hubblesite.org/explore_astronomy/black_holes/

This NASA Web page describes observations of a recent meteoroid impact on the moon, which created a new crater. It includes audio and a remarkable video of the impact.Go to: http://science.nasa.gov/headlines/y2006/13jun_lunarsporadic.htm?list43643