Issues

Cosmic inflation is bolstered, but some inconsistencies await resolution.

First-principles calculations provide insight into one of the newest and most promising classes of materials for photovoltaic devices.

Milestones are slipping for US efforts to round up vulnerable fissile materials and convert research reactors to low-enriched uranium.

With spending caps in place, President Obama proposes an off-budget fund to support additional R&D. NASA would ground a flying observatory, and DOE would sharply curtail its nonproliferation programs.

Interfering atoms and molecules serve as exquisite rulers that sharpen our knowledge of physical laws, measure tiny forces, and reveal subtle properties of matter.

Catching the black hole in the act of ingesting a star can reveal a lot about the normally quiet heart of a distant galaxy.

If classroom practices designed to increase diversity in physics are to succeed, physics teachers need to understand students’ perspectives.

Electrons in a so-called topological insulator circulate around the material’s boundary without ever straying into the bulk. Uncharged photons can be induced to carry out similar behavior.