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April 1996

Volume 49, Issue 4

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Reflections on the Fate of Spacetime

Edward Witten
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String theory carries the seeds of a basic change in our ideas about spacetime and in other fundamental notions of physics.

The Physics of Granular Materials

Heinrich M. Jaeger, Sidney R. Nagel, and Robert P. Behringer
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The rich dynamics of these ubiquitous and important materials are just beginning to be understood. Now there are suggestions that processes taking place on astrophysical scales may mirror those occurring in a pile of sand.

Nuclear Contamination from Weapons Complexes in the Former Soviet Union and the United States

Don J. Bradley, Clyde W. Frank, and Yevgeny Mikerin
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The race for nuclear arms supremacy resulted in the discharge of large amounts of radioactivity into the environment, far more by the USSR than by the US.
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Physics Update

Benjamin P. Stein, Phillip F. Schewe, and Bertram M. Schwarzschild
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The Golemization of Relativity

N. David Mermin
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More Spirited Debate on Physics, Parapsychology and Paradigms

Alexander A. Berezin, Shimon Malin, and Jonathan P. Dowling
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Once More Unto the Gordon & Breach

Madeleine Villard, Lawrence Cranberg, Marc H. Brodsky, and Harry Lustig
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Physics Departments Should Emphasize Experiments…

Forrest M. Mims III
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… and also Teach Students How to C

Zachary H. Levine
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Name the Reviewers, Not the Researchers

Lloyd Kannenberg
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George W. Hill Was Eccentric—But Central to Astronomy

Roy D. North
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Third World Physicists Seek Donations of Scientific Publications

Tatiana Divens
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Corrections

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Telescope Array Begins Interferometric Imaging of Stars at Optical Wavelengths

Bertram Schwarzschild
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Optical telescope arrays are breaking into the milliarcsecond imaging business, long a monopoly of very‐long‐baseline radio telescope arrays.

GaN Laser Diode Brightens Hopes for a Long‐Lived, Short‐Wavelength Device

Barbara Goss Levi
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In the race to produce a short‐wavelength semiconductor laser, diode lasers based on gallium nitride were late leaving the starting gate, but they have the potential to challenge the current leader.

Sound from Sunspots Generates Heat As Well As Light

Ray Ladbury
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Heuoseismologists are just beginning the difficult task of investigating local solar features and processes. Their intriguing if somewhat confusing results to date suggest that they may eventually illuminate the dynamics of sunspots and other important solar phenomena.
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Neocortical Dynamics and Human EEG Rhythms

Paul L. Nunez and Samuel J. Williamson, Reviewer
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Introduction to Space Physics

M. G. Kivelson, Editor, C. T. Russell, Editor, and Michael E. Brown, Reviewer
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Fluid Dynamics for Physicists

T. E. Faber and Stanley A. Berger, Reviewer
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Frontiers of Complexity: The Search for Order in a Chaotic World

Peter Coveney, Roger Highfield, and N. David Mermin, Reviewer
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Space, Time and Quanta: An Introduction to Contemporary Physics

Robert Mills and Kenneth S. Krane, Reviewer
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Thin‐Film Deposition: Principles and Practice

Donald L. Smith and David W. Hoffman, Reviewer
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New Books

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Focus on Imaging

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Neugebauer and Others Honored by AAS

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Engineering Academy Enlarges Its Ranks

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National Academy of Sciences Honors 13 Individuals

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FREE

Gérard H. de Vaucouleurs

Frank N. Bash, Ronald J. Buta, and Harold G. Corwin, Jr.
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FREE

Herbert S. Bridge

John W. Belcher, Alan J. Lazarus, and Vytenis M. Vasyliunas
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FREE

Chih‐Kung Jen

Frank J. Adrian and Walter G. Berl
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Washington Ins & Outs: Changes at OSTP, NASA, NSF and DOE; Hill Aides Lobbyists

Irwin Goodwin
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US Scientists Pursue Ties with Cuban Colleagues, Despite Tightened Embargo

Jean Kumagai
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More Students Take Physics, and Teachers Like Teaching Them

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In Brief

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