NASA Center for Mars Exploration
Various resources on Mars Exploration with an educational emphasis.
http://cmex-www.arc.nasa.gov/

JPL Mars Exploration Program
Various sections: Extreme Planet, Follow the Water, Mars Rocks, Life on Mars?, The Martian Mystique and Just for Kids.
http://mars.jpl.nasa.gov/

Polar Landing Site for a First Mars Expedition
Discusses the reasons why a site on the Martian pole might be the best place to land a first expedition to Mars.
http://www.sff.net/people/Geoffrey.Landis/pole.html

Mars In the Mind of Earth
A Set of Ongoing Bibliographies of Terran Literature concerning the Planet Mars
http://www-personal.umich.edu/~cerebus/mars/

Romance to Reality
settlement plans
http://members.aol.com/dsfportree/explore.htm

2009 Reference Mission Overview
NASA Mars Mission
http://cmex-www.arc.nasa.gov/MarsNews/Missions/human_missions/Human_Mission_Table.html

Walsh Mars Institute
This site is dedicated to sharing the general science learned about Mars in a simple, easy to access format.
http://www.walshinstitute.org

Mission to Mars IPRO
Reports on a project undertaken to design and plan a manned mission to Mars utilizing existing space technology and off the shelf components. Interdisciplinary effort by students from the Illinois Institute of Technology and the Chicago-Kent College of Law.
http://www.iit.edu/~mars/main.html

Mars Direct
Robert Zubrin's innovative plan to send humans to Mars.
http://www.nw.net/mars/

Russian Mars 96 Mission
Detailed description of failed Mars exploratory mission
http://www.iki.rssi.ru/mars96/

Explore the Planet Mars
Realistic, interactive, 3D walk-though of a Mars base desgined for the first humans to land on Mars including a Mars habitat, greenhouse, Mars car and robot rovers.
http://www.exploremarsnow.org/

Clickworkers
Project helping NASA to date Martian land areas by counting craters. Information on how to participate.
http://clickworkers.arc.nasa.gov/

Why the Hell Aren't We Going to Mars Yet?
Impassioned plea for action on a manned Mars mission
http://users.rcn.com/bobmer.javanet/mars.html