Table of Contents

Random Walk

Pathfinder's Finds
by Douglas L. Smith
Twenty-one years after the Viking landings, JPL has once again set foot on the red planet—a place both stranger and more Earthlike than we had imagined.

Geophysical Secrets Beneath Antarctic Waters
by Joann M. Stock
These icy seas may hold the key to reconstructing ancient plate migrations.

Solar Fuel
by Harry B. Gray
Scientists are laboring to do what plants have been doing for aeons-make clean fuel from sunlight.

Chinatown Revisited: Arsenic and the Los Angeles Water Supply
by Janet G. Hering
What is arsenic doing in our water, and should we be worried about it? A chemical detective story.

Obituaries: Eugene Shoemaker

Faculty File