Issues

After finding the expected value of e/4, experimenters hope next to uncover the state’s true nature and verify its suitability for quantum computation.

Physically distinct but chemically identical molecules can have different electric dipole moments and therefore can respond differently to an inhomogeneous electric field.

It’s not obvious from quantum chromodynamics what sorts of unusual mesons and baryons experimenters should expect.

In realizing the European Spallation Source—which even in its scaled-down form would be the world’s strongest neutron source—the partner nations hope to forge mechanisms for multinational decision making.

The Technology Innovation Program replaces the controversial Advanced Technology Program for supporting high-risk R&D projects.

As Congress reauthorizes the National Nanotechnology Initiative, groups petition the Environmental Protection Agency to step up its regulation of nanomaterials.

The material in comets hasn’t changed much over the past few billion years. Spacecraft that were sent to image, probe, and sample passing comets offer a unique look back in time.

With the interaction between a sharp tip and a surface tailored using combinations of static and time-dependent external fields, scanning probe techniques can image far more than topographic structure.

Historians of the Cold War have paid too little attention to Soviet fears of “space-strike weapons”—that is, possible offensive uses of President Ronald Reagan’s Strategic Defense Initiative.

The recently discovered brown dwarfs that bridge the gap between giant planets and hydrogen-fusing stars are enabling unique insights into low-temperature atmospheres, star and planet formation, and the properties of our galaxy.