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cover: Unlike vertebrates, which use respiratory and circulatory systems to transport oxygen to tissues, insects do so almost exclusively with an elaborate tracheal system. Air-filled tracheal tubes are visible in this synchrotron x-ray phase-contrast image of one of four darkling beetle species (left, third from top). The exquisite detail allowed researchers to determine how the tubes’ volume scales with body mass. To learn about recent advances in x-ray detectors that are partly responsible for such spatial resolution, turn to the article by Sol Gruner on page 29. (Image courtesy of Alexander Kaiser and C. Jaco Klok, adapted from A. Kaiser et al., Proc. Natl. Acad. Sci. USA 104, 13198, 2007.)

Articles

Select this Article FREE		X-ray imaging detectors Sol M. Gruner


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	+ -	Show Topic Advances in detector technology, in concert with new synchrotron sources, x-ray optics, and computational methods, are opening new ways to probe the structure and dynamics of matter.

Select this Article		Betavoltaic power sources Larry C. Olsen, Peter Cabauy, and Bret J. Elkind


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	+ -	Show Topic A decades-old technology for producing low-level electric current has experienced a recent resurgence in interest and potential applications.

Select this Article FREE		Risky business: A study of physics entrepreneurship Orville R. Butler and R. Joseph Anderson


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	+ -	Show Topic Physicists who work at startup companies create and improve marketable technologies. But their goals are not always aligned with those of the funders who pay the bills.

Readers' Forum

Measured responses to quantum Bayesianism

Select this Article FREE		Measured responses to quantum Bayesianism Robert B. Griffiths


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Select this Article FREE		Measured responses to quantum Bayesianism Ching Hung Woo


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Select this Article FREE		Measured responses to quantum Bayesianism Michael Nauenberg


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Select this Article FREE		Measured responses to quantum Bayesianism Art Hobson


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Select this Article FREE		Measured responses to quantum Bayesianism Blake Stacey


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Select this Article FREE		Measured responses to quantum Bayesianism N. David Mermin


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Open letter to the associate director for DOE’s Office of Fusion Energy Sciences

Select this Article FREE		Open letter to the associate director for DOE’s Office of Fusion Energy Sciences Vyacheslav Lukin and Anne White


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Delivering science to the public

Select this Article FREE		Delivering science to the public Laura Berzak Hopkins


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Select this Article FREE		Delivering science to the public Ben P. Stein


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Correction

Select this Article FREE		Correction


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Search and Discovery

Select this Article FREE		Physics Nobel honors pioneers in quantum optics Ashley G. Smart


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	+ -	Show Topic David Wineland used light to manipulate trapped atoms, and Serge Haroche used atoms to manipulate trapped light.

Select this Article		The original evidence of supersolidity in helium-4 is explained away Bertram M. Schwarzschild


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	+ -	Show Topic The 2004 “discovery” experiment was long thought to be immune to elastic artifacts. But a careful repetition shows that it wasn’t.

Select this Article		Temperature-sensitive colloids show off an elusive melting mechanism Johanna L. Miller


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Physics Update

Select this Article		Ultracold chemistry in supersonic beams Stephen G. Benka


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Select this Article		Highly charged ions challenge QED Steven K. Blau


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Select this Article		Snowfall thickens the East Antarctic ice sheet Charles Day


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Select this Article		An optofluidic random laser Richard J. Fitzgerald


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Select this Article		Extreme water Stephen G. Benka


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Issues and Events

Select this Article FREE		Hong Kong’s physics departments adapt to education overhaul Charles Day


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	+ -	Show Topic In September universities in the Chinese territory switched from three-year, English-style degree programs to four-year, US-style degree programs.

Select this Article		Robotic vehicles taking up positions under the sea David Kramer


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	+ -	Show Topic Autonomous vehicles offer budget savings and can free up manned ships for other duties, US Navy officials say.

Select this Article FREE		NOAA consolidates its climate-modeling network Jermey N. A. Matthews


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	+ -	Show Topic Research at neighboring Earth sciences institutes is expected to feed into NOAA’s new Center for Weather and Climate Prediction.

Books

Select this Article FREE		From Here to Infinity: A Vision for the Future of Science Joel Primack, Reviewer


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Select this Article FREE		The Beginning of Infinity: Explanations That Transform the World Howard Barnum, Reviewer


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Select this Article FREE		Neural Control Engineering: The Emerging Intersection Between Control Theory and Neuroscience Jack Cowan, Reviewer


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Select this Article FREE		Physics Around Us: How and Why Things Work Charles Adler, Reviewer


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Select this Article FREE		New books


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New Products

Select this Article FREE		Focus on software and data acquisition


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Obituaries

Select this Article FREE		Jarus William Quinn Paul L. Kelley


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Quick Study

Select this Article		Looking at volcanoes with cosmic-ray muons Giulio Saracino and Cristina Cârloganu


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	+ -	Show Topic Penetrating particles created in the atmosphere reveal internal volcanic structures in much the same way that x rays image internal tissue and bones.