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July 2010

Volume 63, Issue 7

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Working toward a world without nuclear weapons

Sidney D. Drell
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Limiting the number of warheads is a good beginning, but getting to the end state calls for new thinking. Six specific steps can start us down that path.
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Touring the atmosphere aboard the A‐Train

Tristan S. L'Ecuyer and Jonathan H. Jiang
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A convoy of satellites orbiting Earth measures cloud properties, greenhouse gas concentrations, and more to provide a multifaceted perspective on the processes that affect climate.

Rutherford's geophysicists

Gregory A. Good
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Although both trained in nuclear physics, Edward Bullard and Patrick Blackett enjoyed careers that, taken together, spanned the broad range of Earth sciences, including seismology, geomagnetism, marine geology, and plate tectonics.
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Cosmic rays' origins unclear

Yousaf Butt
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Coming to terms with decoherence

Erich Joos and H. Dieter Zeh
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Hair‐raising effects of electrostatic trick

Jonathan Allen
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Mayer earned the lunar‐table prize

Haywood Smith, Jr
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Students need to see education's job relevance

Chuck Gallo
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No simple cause and effect for glacial melt

Michael Garstang
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Scientific declarations best left to scientists

B. K. Ridley
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Teaching amid the research obsession

Roger S. Jones
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Notes on Strangest Man

Frank R. Tangherlini
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The need for nondestructive sampling

Antonio Zecca and Luca Chiari
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Correction

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Filming vortex lines reconnecting in a turbulent superfluid

Bertram Schwarzschild
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Tiny tracer particles of hydrogen ice attach themselves to quantized vortex lines in superfluid helium‐4, making it possible to study quantum turbulence with unprecedented resolution.

Laboratory experiment shows that noise can be lessened for LISA

Johanna Miller
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With a proposed spaceborne interferometer that dwarfs the Moon's orbit, researchers hope to detect gravitational waves. To do that, they need to eliminate the noise from laser frequency fluctuations.

Watching a Bose–Einstein condensate crystallize

Mark Wilson
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If the interaction between ultracold atoms and photons in an optical cavity is strong enough, it gives rise to an intriguing quantum phase transition.

A complex fluid exhibits unexpected heterogeneous flow

Johanna Miller
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Depending on the conditions, the localized flow can persist for minutes, hours, or more than a day.

Physics Update

Charles Day, Jermey N. A. Matthews, Steven K. Blau, Richard J. Fitzgerald, and R. Mark Wilson
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World lays groundwork for future linear collider

Toni Feder
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New physics from the Large Hadron Collider can best be explored with a large lepton collider; realizing one will require mobilizing accelerator and particle physicists, funding agencies, and politicians.
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Obama's nuclear weapons agenda is on multiple rapid tracks

David Kramer
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Nonproliferation moves to the top of the president's priority list; a new arms treaty with Moscow, a summit on nuclear security, and a UN disarmament conference cap a nuclear spring.

Airport checkpoint technologies take off

Jermey N. A. Matthews
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From bench‐top instruments to full‐body scanners, the US government is testing new equipment to screen humans for explosives.

Liquid‐explosives scanners stand trial in airports

Jermey N. A. Matthews
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Web Watch

Charles Day
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The Primordial Density Perturbation: Cosmology, Inflation and the Origin of Structure

David H. Lyth, Andrew R. Liddle, and Chung‐Pei Ma, Reviewer
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On Fact and Fraud: Cautionary Tales from the Front Lines of Science

David Goodstein and Bernard J. Feldman, Reviewer
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Quantum Information

Stephen M. Barnett and M. Suhail Zubairy, Reviewer
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The Edge of Physics: A Journey to Earth's Extremes to Unlock the Secrets of the Universe

Anil Ananthaswamy and Casey O'Hara, Reviewer
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New Books

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Focus on software

Andreas Mandelis
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William Ian Axford

Asoka Mendis and Wing‐Huen Ip
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Howard Glenn Voss

Roderick M. Grant and John W. Layman
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Power and spin in the beautiful game

John Eric Goff
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Bursting bubbles

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