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Is solid helium a supersolid?

Physics Today - Thu, 04/30/2015 - 02:36
Recent experiments suggest that helium-4 atoms can flow through an experimental cell filled with solid helium. But that incompletely understood flow is quite different from the reported superfluid-like motion that so excited physicists a decade ago.
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Asteroseismology

Physics Today - Thu, 04/30/2015 - 02:36
Pulsations known as starquakes can provide precious glimpses into a star’s interior—and clues to how the star will live and die.
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From the archives: The future of lasers

Physics Today - Thu, 04/30/2015 - 02:36
A panel discussion: Nine specialists foresee an expanded frequency range, new kinds of lasers, and many novel applications.
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New hydrogen-isotope measurements refine the picture of water on Mars

Physics Today - Thu, 04/30/2015 - 02:36
Atmospheric maps and in situ spectrometry of clay minerals constrain climate models and the prevalence of water in the planet’s ancient past.
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Superresolution microscopy reveals chromosomes’ smallest structure

Physics Today - Thu, 04/30/2015 - 02:36
It’s long been thought that at size scales of tens of nanometers, our genetic material is packaged in a neat, orderly way. New observations show that’s not the case.
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A stellar source of lithium is caught in the act

Physics Today - Thu, 04/30/2015 - 02:36
To explain the observed abundance of the light metallic element, astrophysical modelers have concluded that much of it was produced in stars. But direct evidence has been lacking until now.
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Artificial chameleon

Physics Today - Thu, 04/30/2015 - 02:36
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Glaciers melt noisily into the sea

Physics Today - Thu, 04/30/2015 - 02:36
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Record-energy collisions coming soon at the LHC

Physics Today - Thu, 04/30/2015 - 02:36
The machine that discovered the Higgs boson is flexing its muscles again. The results could be stunning new findings or striking new mysteries.
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New ITER head is confident the fusion energy project will succeed

Physics Today - Thu, 04/30/2015 - 02:36
Bernard Bigot sees management of the seven-party international effort as a greater challenge than the technological demands.
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Foundations join forces to raise funds for basic research

Physics Today - Thu, 04/30/2015 - 02:36
With federal funding in decline, philanthropists are stepping up to back risky projects, early-career researchers, and expensive scientific equipment.
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Momentum grows for new climate agreement

Physics Today - Thu, 04/30/2015 - 02:36
Pledged US greenhouse gas cuts should need no new authorizations from Congress, officials say.
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US nuclear waste may have temporary home

Physics Today - Thu, 04/30/2015 - 02:36
Combined developments could break the logjam over disposition of spent nuclear fuel and defense high-level radioactive waste.
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Naval reactors in need of redesign

Physics Today - Thu, 04/30/2015 - 02:36
Nonproliferation concerns should propel US Navy to switch to safer nuclear fuel, says FAS task force.
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HAWC inauguration

Physics Today - Thu, 04/30/2015 - 02:36
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