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Issues

From the Editor

Physics Today 74 (9), 8 (2021); https://doi.org/10.1063/PT.3.4824

Readers’ Forum

Physics Today 74 (9), 10–11 (2021); https://doi.org/10.1063/PT.3.4825
Physics Today 74 (9), 11 (2021); https://doi.org/10.1063/PT.3.4826
Physics Today 74 (9), 11 (2021); https://doi.org/10.1063/PT.3.4827

Search and Discovery

Physics Today 74 (9), 12–14 (2021); https://doi.org/10.1063/PT.3.4828

The tropical forest can no longer be counted on to help clean up humanity’s environmental mess.

Physics Today 74 (9), 14–16 (2021); https://doi.org/10.1063/PT.3.4829

NMR measurements and previously published specific-heat data rule out earlier claims of strontium ruthenate’s spin-triplet superconductivity.

Physics Today 74 (9), 17–18 (2021); https://doi.org/10.1063/PT.3.4830

A sheared magnetic loop in the Sun’s corona can give rise to a thinning sheet of electrical current, magnetic reconnection, and tension forces strong enough to hurl material into space.

Issues and Events

Physics Today 74 (9), 20–22 (2021); https://doi.org/10.1063/PT.3.4831

Experts say lithium-ion batteries will be overtaken for grid-scale energy-storage applications by other battery technologies and nonchemical storage.

Physics Today 74 (9), 23–25 (2021); https://doi.org/10.1063/PT.3.4832

The medical industry is substituting x-ray sources for cesium-based blood irradiators. Other industries are also exploring alternative technologies.

Articles

Physics Today 74 (9), 26–33 (2021); https://doi.org/10.1063/PT.3.4833

Scientists can help by partnering with museums, out-of-school programs, schools, organizations that develop instructional materials, or other educational projects.

Physics Today 74 (9), 34–40 (2021); https://doi.org/10.1063/PT.3.4834

Modern high-performance CT scanners are unparalleled among three-dimensional imaging systems in data acquisition speed and spatial resolution.

Physics Today 74 (9), 42–48 (2021); https://doi.org/10.1063/PT.3.4835

First envisioned for elucidating crystalline structures, the technique is now used for high-resolution lensless imaging, wavefront sensing, and more.

Books

Physics Today 74 (9), 50–51 (2021); https://doi.org/10.1063/PT.3.4836
Physics Today 74 (9), 51–52 (2021); https://doi.org/10.1063/PT.3.4837
Physics Today 74 (9), 52–53 (2021); https://doi.org/10.1063/PT.3.4838

New Products

Physics Today 74 (9), 55–56 (2021); https://doi.org/10.1063/PT.3.4839

Obituaries

In Special Collection: Print Obituaries
Physics Today 74 (9), 59 (2021); https://doi.org/10.1063/PT.3.4840
In Special Collection: Print Obituaries
Physics Today 74 (9), 60 (2021); https://doi.org/10.1063/PT.3.4841

Quick Study

Physics Today 74 (9), 62–63 (2021); https://doi.org/10.1063/PT.3.4842

Many transparent animals rely for survival on structures built from their own mucus. To study such organisms deep underwater, researchers are using robots outfitted with lasers.

Back Scatter

Physics Today 74 (9), 64 (2021); https://doi.org/10.1063/PT.3.4843
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