Geologists on Mars

In March 2004, two NASA explorers discovered firm evidence that water once flowed on Mars—perhaps enough water to harbor life.

The Martian Surface

A map of the Martian surface.
Although Mars is just one-fourth the size of Earth, its surface area is about equal to the total area of Earth's dry landmass.
© The American Museum of Natural History

Although Mars is just one-fourth the size of Earth, its surface area is about equal to the total area of Earth's dry landmass.

For Educators

Classroom discussion activity for use with the video.


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