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June 2008

Volume 61, Issue 6

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Comets and the early solar system

Donald Brownlee
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The material in comets hasn't changed much over the past few billion years. Spacecraft that were sent to image, probe, and sample passing comets offer a unique look back in time.

Probing physical properties at the nanoscale

Matthew J. Brukman and Dawn A. Bonnell
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With the interaction between a sharp tip and a surface tailored using combinations of static and time‐dependent external fields, scanning probe techniques can image far more than topographic structure.

The Strategic Offense Initiative? The Soviets and Star Wars

Peter J. Westwick
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Historians of the Cold War have paid too little attention to Soviet fears of “space‐strike weapons”—that is, possible offensive uses of President Ronald Reagan's Strategic Defense Initiative.
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Dispelling myths and highlighting history of the heliocentric model

Ljiljana Dobrosavljevic‐Grujic, Leonid V. Azaroff, Robert N. Oerter, Michael Schaaf, Frank R. Tangherlini, Paul Dickson, William Unruh, and Mano Singham
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What is ‘real’: A brief comparison

Karl D. Stephan
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Correction

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Two groups measure the quasiparticle charge of the 5∕2 fractional quantum Hall state

Charles Day
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After finding the expected value of e/4, experimenters hope next to uncover the state′s true nature and verify its suitability for quantum computation.

Electric‐field gradient sorts molecules according to their shape

Johanna Miller
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Physically distinct but chemically identical molecules can have different electric dipole moments and therefore can respond differently to an inhomogeneous electric field.

Collider data show evidence for a meson made of four quarks

Bertram Schwarzschild
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It's not obvious from quantum chromodynamics what sorts of unusual mesons and baryons experimenters should expect.

Physics Update

Phillip F. Schewe, Jermey N. A. Matthews, and Stephen G. Benka
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Scattered countries revive hope for European Spallation Source

Toni Feder
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In realizing the European Spallation Source—which even in its scaled‐down form would be the world's strongest neutron source—the partner nations hope to forge mechanisms for multinational decision making.

Revamped grants program offers R&D funds for ‘critical national needs’

David Kramer
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The Technology Innovation Program replaces the controversial Advanced Technology Program for supporting high‐risk R&D projects.
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Lawmakers fret over health, safety impacts of nanotechnology

David Kramer
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As Congress reauthorizes the National Nanotechnology Initiative, groups petition the Environmental Protection Agency to step up its regulation of nanomaterials.
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Ehrenfest letters surface

Toni Feder
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Lockheed Martin seeds Rice center

Jermey N. A. Matthews
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From school board to state senate: Running for office

Toni Feder
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News Notes

David Kramer, Jermey N. A. Matthews, and Toni Feder
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Web Watch

Charles Day
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Physics: No longer a vocation?

Anita Mehta
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The Physics of NASCAR: How to Make Steel + Gas + Rubber = Speed

Diandra Leslie‐Pelecky and Giovanni G. Fazio, Reviewer
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Applications of Synchrotron Radiation: Micro Beams in Cell Micro Biology and Medicine

Ari Ide‐Ektessabi and Stefan Vogt, Reviewer
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A History of the Kennedy Space Center

Kenneth Lipartito, Orville R. Butler, and George English, Reviewer
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Galaxies in Turmoil: The Active and Starburst Galaxies and the Black Holes That Drive Them

Chris Kitchin and Nancy A. Levenson, Reviewer
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New Books

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Focus on sensors

Lawrence G. Rubin
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Boris Valerianovich Chirikov

Felix Izrailev, Allan Lichtenberg, and Dima Shepelyansky
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John Morgan Greene

Philip J. Morrison, John L. Johnson, and Vincent Chan
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Brown dwarfs: Failed stars, super Jupiters

Adam J. Burgasser
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When galaxies collide

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