This NASA fact sheet provides a description of two new Mars rovers: Spirit and Opportunity. The document describes instruments mounted on the rovers as well as some details about the mission goals and procedures. Full description.

Since landing on Mars in January 2004, Spirit and Opportunity, the Mars Exploration Rovers, have helped scientists learn an amazing amount about the red planet. The sophisticated rovers far exceeded expectations with the geological clues they have dug up about the planet's past. In this video tour of the rover landing sites, the mission's principal science investigator, Steve Squyres, describes some ... Full description.

This Exploratorium site provides the latest information about the two Mars rovers landing on Mars in 2004. It includes resources about the search for life on Mars, the Martian environment, and the mechanics of the Mars rovers themselves. Hands-on activities and a live webcast are also provided. Full description.

This series of animations depicts the Mars Exploration Rover (MER) in various stages of its current mission. Videos are divided into: Launch and Cruise; Entry, Descent and Landing on Mars; and Exploring the Martian Surface. Full description.

In this video NASA scientists discover firm evidence that water once flowed on Mars?perhaps enough water to harbor life. The site includes links to five essays about Mars, "A Tale of Two Rovers," "Why Go to Mars," "Visions (and Revisions) of Mars," "When Worlds Diverge," and "Is the Signature Still Wet?" It also has photographs of Mars and interactive presentations. Full description.

It is not easy to get to Mars. Dozens of past missions have failed, with only a handful even attempting to land on the planet's surface. However, in January 2004, careful planning paid off when the Mars Exploration Rover mission successfully landed two rovers, Spirit and Opportunity. This video segment, adapted from a NOVA television broadcast, describes the history of Mars exploration, the many failed ... Full description.

This interactive illustration, adapted from a NOVA broadcast, shows viewers in greater detail how each of the Mars Exploration Rovers that arrived on the Red Planet in 2004 was equipped to travel, communicate, survive on the Martian surface, and collect data, particularly information to determine whether water was ever present. Users can roll their mouse over a highlighted feature to see a magnified ... Full description.

This collection includes QuickTime, MPEG-1, and GIF animations and interactive images of Martian exploration and geology. These visualizations illustrate Mars' surface geology and historical and current water presence and display information from the Spirit, Opportunity, Pathfinder, and Sojourner rovers and landers. Many of the visualizations have long download times, but are well worth your patience. ... Full description.

Students will learn that Mars, and each planet in the solar system, is unique due to the materials from which it is made and the processes that shaped it. Images and information from Mars exploration voyages, including the Viking Mission in 1975, the Pathfinder Landing in 1997, the Mars Global Surveyor project, the Mars Odyssey and Mars Express spacecrafts, the Mars Exploration Rovers, and the Reconnaissance ... Full description.

This interactive activity lets users try driving a rover on Mars. The goal is to reach a series of rocks that scientists want to study. At the end, one sees the path that the Sojourner took on its 1997 Pathfinder mission. Full description.