Issues
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Letters
Search and Discovery
Galaxy clusters tighten constraints on the cosmic accelerator
Evidence from clusters and elsewhere suggests that the universe’s accelerated expansion is driven by something that behaves like Einstein’s cosmological constant.
Oscillating chemistry explains complex, self-assembled crystal aggregates
Leaflike sheets, wormy ropes, and helical filaments are just some of the shapes that can emerge, under the right conditions, from inorganic compounds.
Issues and Events
Physicists in forensics
From faulty products to murder, physicists help figure out what really happened.
Accelerators shrink to meet growing demand for proton therapy
Smaller, cheaper accelerators promise to make proton radiation therapy available to more cancer patients.
Brookhaven light source to brighten x-ray beams
Leading European synchrotron also approves a seven-year upgrade.
North Carolina institute offers to archive old astronomy data
Is digitizing astronomical photographic plates worth the time and money?
Articles
Physics in the oil sands of Alberta
Alberta’s petroleum reserves are comparable to Saudi Arabia’s, but accessing that oil poses challenges in the physics of fluids and particulates.
Testing relativity from the 1919 eclipse—a question of bias
When interpreting experimental results, context is everything. The researchers who took and analyzed the most important eclipse data had good reasons for judging the experiment a victory for Albert Einstein.
Laser-driven plasma-wave electron accelerators
Surfing a plasma wave, a bunch of electrons or positrons can experience much higher accelerating gradients than a conventional RF linac could provide.
Books
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Obituaries
Edwin Ernest Salpeter
Quick Study
The extraordinary sound of the hang
An increasingly popular percussion instrument created less than 10 years ago has inspired musicians and physicists alike to explore its sonic properties.