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24 Martian Field Trips on
From dunes in the western United States to acid lakes in Australia, planetary geologists are looking here on Earth for clues to Mars' geologic past and present.
Robotic Geologists Take to Mars
Next month, the first of two twin robotic geologists will head to the Red Planet, armed with a suite of tools for conducting geology on the harsh martian surface.
Lisa M. Pinsker
We Can All Go to Mars
Human exploration or robotic? Two leaders of the Planetary Society suggest how to realize a combination through the Mars Outposts proposal.
Louis D. Friedman and Bruce C. Murray
48 GEOLOGIC COLUMN
2 From the Editor
4 Letters: Perspectives from readers
32 Where on Earth?
33 Profiles: Carolyn and Barb Tewksbury
36 Benchmarks: Looking back in Geotimes
37 Energy & Resources: Salt
44 Classified Ads: Career Opportunities
47 Contributors Page
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