This article presents information about the radiation hazards facing astronauts who travel to Mars. It covers the types of radiation including the most dangerous, galactic cosmic rays (GCRs), the damage it does to the body, and methods of shielding against it. One can also listen to this story via streaming audio or a downloadable file. Full description.

Users can subscribe to this free service, which will automatically send a new podcast each day. Topics include nanotechnology, astrophysics and space, observing Earth, and the human world. Full description.

Living on Earth with Steve Curwood is the weekly environmental news and information program distributed by National Public Radio. Every week approximately 300 National Public Radio stations broadcast Living on Earth's news, features, interviews and commentary on a broad range of ecological issues. Users can play or download mp3 files of this radio broadcast. They can choose the current week's show, ... Full description.

Podcasts of the Science Update radio show are available by subscription, or they can be streamed or downloaded directly from the website. These daily sixty-second radio features, sponsored by the American Association for the Advancement of Science (AAAS), cover the latest discoveries in science, technology and medicine. Subscription podcasts are delivered each Friday directly to subscribers' computers. ... Full description.

Coral reef ecologist Jeremy Jackson lays out the shocking state of the ocean today: overfished, overheated, polluted, with indicators that things will get much worse. A leader in the study of the ecology and evolution of marine organisms, Jeremy Jackson is known for his deep understanding of geological time. This 18:19 minute film, filmed as part of Mission Blue Voyage in April, 2010, is one of four ... Full description.

This National Aeronautics and Space Administration (NASA) article discusses the connection between dust storms in Africa, and red tides along the Florida coast. Red tides are blooms of toxic algae that kill fish, birds, and mammals, as well as cause health problems in humans. Storm activity in the Sahara Desert region kicks up topsoil that winds transport into the Gulf of Mexico. These clouds fertilize ... Full description.

Estuaries.Gov is the educational site for NOAA's National Estuarine Research Reserve System (NERRS), managed and maintained by NERRS education staff. This site provides, primarily, an avenue for elementary, middle and high school students, and their teachers, to learn more about estuaries, research, and explore NOAA?s ?living laboratories? - the National Estuarine Research Reserves. The Estuary Video ... Full description.

This is a report of a joint Canadian and American project sampling water in the Beaufort Sea and the MacKenzie River. The initial sampling phase was conducted by helicopter (July 21-26, 2004). The first portion of the ARDEX project was concerned with collecting water samples for nutrients, colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) from various points in the rivers ... Full description.

This is the record of an environmental reporter's expedition to Antarctica. During his time in Antarctica, the author wrote reports and captured photos, video and audio of the animals, the environment and the people who live there. Topics include wildlife and how it has been affected by climate change, equipment needed for working in Antarctica, and life at Palmer Station. A series of journal entries ... Full description.

This website, designed for K-12 teachers and students, offers materials and activities based on the "Extreme 2004: Exploring the Deep Frontier" mission to explore deep-sea hydrothermal vents. Students can step into the shoes of deep-sea scientists as they follow the expedition and listen to recordings of student communications with the researchers via e-mail and telephone calls placed directly to ... Full description.