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April 2004

Volume 57, Issue 4

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Special Issue: Planetary Diversity

David J. Stevenson
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Planets come in a wide variety of types and exhibit a wide range of complex behavior. Still, we can ask—and answer—some fundamental questions about them.

The Kuiper Belt

Michael E. Brown
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The hundreds of objects lying beyond Neptune's orbit provide data that enable scientists to trace the history of the outer planets. They also present an intriguing mystery.

Origin of Terrestrial Planets and the Earth–Moon System

Robin M. Canup
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Increasingly sophisticated computer simulations show how the four solid planets could have emerged through collisions and accretion. One late, giant collision with Earth is the likely origin of the Moon.

Probing the Giant Planets

Tristan Guillot
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More than a hundred extrasolar giant planets have been discovered in the past few years. To understand how they were formed, we must study in detail the giants closest to us: Jupiter and Saturn.

Water on Mars

Bruce M. Jakosky and Michael T. Mellon
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Mars is cold enough that its meager water content appears to exist today simply in frozen and gas phases. But as recent evidence suggests, that may not have always been the case.

A Look at the Galilean Satellites After the Galileo Mission

Torrence V. Johnson
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From volcanic eruptions hotter than those typically found on Earth to ocean sandwiches with water trapped between ice layers, the Galileo mission revealed fascinating phenomena on Jupiter's four largest moons.
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Physics Update

Ben Stein, Phil Schewe, and Stephen Benka
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Total Relativity: Mach 2004

Frank Wilczek
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National Observatories: Contention Continues

William E. Howard, III, Cameron Reed, and W. Patrick McCray
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US Climate Research Plan May Ask Wrong Question

John Firor
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’Physics of Whatever’ Relevant but Not Always Accurate

Timothy J. Gay and Howard Brody
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Ethical Dilemmas of US Antiterrorism Policy

Brian Connolly
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Another Side to Roots of Terrorism

Bernard H. White
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Private Funding Could Cut Red Tape for Homestake

Martin J. Cooper
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Notes on Hanford Reactor Start‐up

S. George Bankoff and Alvin Weinberg
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New Facilities Expand Protein Crystallography Opportunities

Paul Langan and Benno P. Schoenborn
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Evidence Reported for a ‘Supersolid’ Phase of Helium‐4

Barbara Goss Levi
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The most likely explanation for a sharp drop in rotational inertia in crystalline 4He is the onset of superfluid behavior.

Dubna–Livermore Collaboration Forms Two New Superheavy Elements

Charles Day
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The latest additions to the periodic table are element 115 and its daughter, element 113.

New Silicon‐Based Device Modulates Light at 1 GHz

Charles Day
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DOE Warms to Cold Fusion

Toni Feder
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Whether outraged or supportive about DOE's planned reevaluation of cold fusion, most scientists remain deeply skeptical that it's real.

French Scientists Take to the Streets to Save Research

Toni Feder
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Researchers in France have quit the administrative parts of their jobs to show the government and the public the seriousness of their concerns about the country's research enterprise and universities.
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Bush Administration Accused of Misusing Science

Jim Dawson and Paul Guinnessy
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An independent science group claims to have documented scores of cases of scientific manipulation and abuse throughout the federal government.

Semester Abroad to SOAR in Chile

Toni Feder
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Magnet Lab Attracts Boebinger

Toni Feder
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US Physics Job Market Holds Steady

Toni Feder
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News Notes

Jim Dawson and Toni Feder
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Web Watch

Charles Day
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Special Report: Bush R&D Budget Remains Focused on War, Terrorism, and Security in FY 2005; Civilian R&D Funding Flat

Jim Dawson and Paul Guinnessy
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The administration is proposing another record‐setting R&D budget that is $5.5 billion more than last year. But the entire increase would go to Pentagon weapons systems and homeland security programs.
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CLEO∕IQEC Assembles in the City by the Bay

Judith Barker
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Isaac Newton

James Gleick and Larry Stewart, Reviewer
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Quantum Field Theory in a Nutshell

A. Zee and Zvi Bern, Reviewer
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Extreme Ultraviolet Astronomy

Martin A. Barstow, Jay B. Holberg, and Gerard A. Kriss, Reviewer
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Atomic and Electronic Structure of Solids

Efthimios Kaxiras and Karin M. Rabe, Reviewer
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Quantum Theory of Solids

Karin M. Rabe, Reviewer
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New Books

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Focus on Materials

Lawrence G. Rubin
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NAS Bestows Awards This Month

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APS to Grant Awards at Meeting

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OSA Presents Engineering Excellence Awards

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AGU Announces Writing Awards

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IEEE Names Winner of Top Medal

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In Brief

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Ilya Prigogine

Stuart A. Rice
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Vernon Ellsworth Derr

C. Gordon Little
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David B. Fossan

Linwood L. Lee, Robert L. McGrath, Gene D. Sprouse, and Paul D. Grannis
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Albert Joseph Howard Jr

D. Allan Bromley, Peter Parker, and Harvey S. Picker
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Elizabeth Ann Johnson

Angus MacKinnon and John Pendry
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H. Douglas Keith

Frank S. Bates, Stephen Z. D. Cheng, and Andrew J. Lovinger
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