- Center for Mars Exploration (CMEX)
- Features Mars concept maps, digital Mars atlases, images, and science and robotic mission information from NASA. - MarsNews.com
- Newswire for the new frontier. In addition to news, the site also provides contextual information, such as backgrounds of the various missions, and topics like terraforming and the potential for life on Mars. - Nine Planets: Mars
 - Sometimes referred to as the Red Planet, Mars is the fourth planet from the Sun and the seventh largest planet in our Solar System. Find information about its atmosphere, geology, and satellites, Deimos and Phobos. - Views of the Solar System: Mars
- Offers an introduction to the Red Planet presenting facts about its atmosphere, temperature, and pressure. Also find photographs, illustrations, and animations of the fourth planet from the sun. - Daily Martian Weather Report
- Martian atmospheric data. See how the climate of the red planet evolves from day to day and season to season. - Whole Mars Catalog at MarsToday.com
- Features sites and news articles addressing the exploration of the Red Planet, its climate, geology, and possible life. - Martian Soil
- Daily blog dedicated to Mars, bringing the exploration of the Red Planet closer to enthusiasts and little green men alike. - New Mars
- A Journal of the Martian Frontier, offering news and perspectives. - Mars Opposition 2003 (8)
- Imagine Mars
- National arts, sciences, and technology education initiative that led young people to work together with educators and civic leaders to design a Mars community for 100 people. - Exploring Mars
- Learn about the planet's major geologic features, its climate, and human efforts to understand and explore it. - International Committee Against Mars Sample Return (ICAMSR)
- Aims to increase public awareness of the Mars Sample Return along with any possible negative consequences that could occur due to MSR canisters either becoming opened unintentionally on impact, or lost during entry into the Earth's atmosphere. - Welcome to the Planets: Mars
- Highlights features of the planet. - Mars Today
- Current conditions on Mars and the planet's relationship to Earth. From NASA's Ames Research Centre. - Mars Clickworkers Pilot Study
- Volunteer to help NASA identify and categorize Martian craters in your web browser, in your free time. - MARSgeo.com: Mars Geology
- Site dedicated to the geology of Mars. Features video and photo galleries from Mars exploration missions, including the rovers Spirit and Opportunity. - Windows to the Universe: Mars
- Looks at its interior and surface, atmosphere, moons, plus myths, missions, news, virtual tour, and more. - Wikipedia: Exploration of Mars
- Hyperlinked article about past, current, and future Mars exploration programmes. - Planet Mars, The
- Describes the planet's surface features and processes, atmosphere, interior, and moons. - Mars Opposition 2007 (7)
- Learn about the Planet Mars's close (54.7 million mile) pass by Earth. Find sites providing maps, charts, and viewing tips for observing the Red Planet in the late December 2007 and early January 2008 sky.
- International MarsWatch
- Network of professional and amateur astronomers observing Mars. Provides information about the 2007 observing season, as well as information about robotic missions to Mars. - HowStuffWorks: How Mars Works
- Looks at the major features of the planet, the climate, how the planet was formed, what may have happened to it, and is there or was there water and/or life on Mars. - Mars24
- Cross-platform Java programme and browser applet which displays a Mars "sunclock", a graphical representation of Mars showing the current sun- and night-sides of Mars. - Exploratorium: Journey to Mars
- Includes information and images from the Mars Exploration Rovers, webcasts, classroom material for teachers, and more. - Mars Activities: Teacher Resources and Classroom Activities
(PDF) - JPL and Arizona State University education programme for introducing K-12 students to the wonders of Mars. - Mars - Exploring The Planets Exibition
- A National Air and Space Museum exhibit presenting facts and statistics for Mars and its satellites, an overview of historic observations, and information about past and current robotic missions to the Red Planet. - Canyons of Mars, From Silicone Dust Rivers?
- Personal hypothesis that the canyons of Mars may have been eroded by rivers of silicone dust made from silica reacted to an ancient methane atmosphere. - Universal Sky Tour: Mars Madness
- Interactive feature tracing the development of the myths surrounding the Red Planet from ancient religious beliefs to modern day fiction and speculation. - Geology of Mars
- Learn about the six geological processes that are either currently operating on Mars or have operated during Martian history. - MARS
- Percival Lowell's 1895 text describing and illustrating the Martian atmosphere and major geologic features. - Mars Mania!
- Designed to motivate students in grades 4-6 to study about Mars, it explores Mars' terrain, atmosphere, weather, seasons, and how it compares to Earth. - Destination Mars
- Learn about myths concerning the Red Planet and study a detailed time line of Mars observation and discoveries. - Explore Mars
- Join NASA's Mars mission as the explore our planetary neighbour. Find the latest news and images of the Red Planet. - Mars: Mankind's Future Lies in Space
- Discusses human exploration, understanding, and possible colonization of Mars. Offers interactivities and a chat room.
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