This 46 minute radio broadcast discusses the NASA announcement in March 2004 that the rover Opportunity explored a crater on Mars that was once soaked with water - the most convincing evidence yet of a warm, wet past on Mars. Though the question of whether that water may have supported life remains, it certainly improves the odds. The second part of the broadcast discusses genetically engineered organisms. ... Full description.

This site provides two radio broadcasts: an update on several space missions and a discussion of McNeil's Nebula. The first 33-minute broadcast discusses space missions exploring the planets in our solar system, such as Cassini in its orbit around Saturn, the twin Mars rovers, and Messenger, soon to lift off for the planet Mercury. The second, a 15-minute clip, discusses how a newborn star is shining ... Full description.

This interactive activity lets you search for past and future landing sites on Mars. A large image of the planet and smaller images of the various landing sites are provided. Your task is to locate each landing site on the large image. Information is provided about each mission and landing site. Full description.

This interactive activity lets you superimpose familiar objects onto images of various features on Mars so you can see just how large they are. The features include crater landing sites, the largest volcano in the solar system, and a headwater area, etc. The objects include a school bus, stadium, Texas, Hawaii, and the contiguous USA. The activity is fun and educational. Full description.

This interactive activity allows users to drop familiar objects onto images of floodplains on Mars to get an idea of just how large they are. The objects to be moved include a school bus, stadium, the state of Texas, the state of Hawaii, and the entire US. The activity is fun and educational, with interesting information embedded throughout. Full description.

This interactive activity lets you superimpose familiar objects onto images of some of the canyons on Mars so you can get an idea of just how big they are. The objects include a school bus, stadium, Texas, Hawaii, and the contiguous US. Informative feedback makes the activity educational as well as fun. Full description.

This interactive activity lets you superimpose familiar objects onto images of volcanoes on Mars (including Olympus Mons, the largest volcano in the solar system), so you can see just how large they are. The dropped objects include a school bus, stadium, Texas, Hawaii, and the contiguous US. Informative feedback makes the activity educational as well as fun. Full description.

The Students for the Exploration and Development of Space (SEDS) provide information on the history and future of Mars exploration. Links are offered when necessary to cover as much information as possible. Hubble Space Telescope images of the planet are given, as well as other images. Life on Mars and Martian lore are also explored. A comprehensive look at investigations covers missions and observations ... Full description.

The Jet Propulsion Laboratory's (JPL) homepage provides links to spacecraft and mission information, imagery, news articles, events, features, and public services. Users can access articles and imagery from the Mars Rover and Cassini missions, images from the Spitzer Space Telescope, and an El Nino/La Nina Watch. Full description.

This interactive activity presents a large image of a canyon on Mars and smaller images of various features contained within it. You try to locate each feature in the large image by clicking on it. Informative feedback makes the activity educational as well as fun. Full description.