Table of Contents

Global Change and the Dark of the Moon
by Steven E. Koonin
Earthshine—the faint, reflected glow that sometimes illuminates the dark disk of the new moon—may hold valuable clues as to whether the earth is gradually getting warmer.

Lee A. DuBridge, 1901-1994
Caltech mourns the loss of its second president, who guided the Institute from 1946 to 1968.

Which Way Is Reverse?
by David Hockney
One of the world's great artists gives his perspective on perspective, reinventing it in the process.

The Ultimate Sharper Image Catalog
by Jay Aller
Palomar Observatory is photographing the entire Northern Hemisphere sky. The results, when analyzed by a program called SKICAT, will produce a computerized catalog containing roughly three times as many objects as the first Palomar Observatory Sky Survey, done in the 1950s.


Books: The Quark and the Jaguar by Murray Gell-Mann

Lab Notes: Do Unto Others Before They Do Unto You


Random Walk