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Issues

From the Editor

Physics Today 73 (12), 8 (2020); https://doi.org/10.1063/PT.3.4624

Readers’ Forum

Physics Today 73 (12), 10–11 (2020); https://doi.org/10.1063/PT.3.4625
Physics Today 73 (12), 11–12 (2020); https://doi.org/10.1063/PT.3.4626
Physics Today 73 (12), 12 (2020); https://doi.org/10.1063/PT.3.4627

Search and Discovery

In Special Collection: The Nobel Prize
Physics Today 73 (12), 14–17 (2020); https://doi.org/10.1063/PT.3.4628

Roger Penrose proved that black holes could and should form in the universe. The topological picture he used in that proof has become foundational to general relativity.

In Special Collection: The Nobel Prize
Physics Today 73 (12), 17–20 (2020); https://doi.org/10.1063/PT.3.4629

By tracking the orbits of stars close to the galactic center, Reinhard Genzel and Andrea Ghez ruled out all possibilities besides a black hole.

In Special Collection: The Nobel Prize
Physics Today 73 (12), 20–23 (2020); https://doi.org/10.1063/PT.3.4630

Although less than a decade old, the technology is already shaking up research in cell biology and molecular biophysics.

Issues and Events

Physics Today 73 (12), 24–26 (2020); https://doi.org/10.1063/PT.3.4631

The ill-understood effect is gaining momentum and opening new avenues of research. CERN’s Compact Linear Collider and other particle accelerators are contributing.

Physics Today 73 (12), 27–29 (2020); https://doi.org/10.1063/PT.3.4632

Cutting the weight of fuel tanks and continuing advances in fuel-cell technologies are key to making hydrogen competitive in aviation.

Articles

Physics Today 73 (12), 32–37 (2020); https://doi.org/10.1063/PT.3.4633

Simulating the acoustics of destroyed or altered amphitheaters, cathedrals, and other architectural sites re-creates their sonic grandeur.

Physics Today 73 (12), 38–43 (2020); https://doi.org/10.1063/PT.3.4634

Experimental studies of the underlying physics are difficult when the only sensors reporting contemporaneous data are human beings.

Physics Today 73 (12), 44–49 (2020); https://doi.org/10.1063/PT.3.4635

Recent changes in ice cover and ocean stratification have been so large that acoustic measurements made during the Cold War no longer reflect current conditions.

Physics Today 73 (12), 50–55 (2020); https://doi.org/10.1063/PT.3.4636

A general approach to analyzing audio files makes it possible to re-create the sound of ancient instruments, identify cross-cultural musical properties, and more.

Books

Physics Today 73 (12), 56–57 (2020); https://doi.org/10.1063/PT.3.4637
Physics Today 73 (12), 57–58 (2020); https://doi.org/10.1063/PT.3.4638
Physics Today 73 (12), 58 (2020); https://doi.org/10.1063/PT.3.4639

New Products

Physics Today 73 (12), 60–63 (2020); https://doi.org/10.1063/PT.3.4640

Obituaries

In Special Collection: Print Obituaries
Physics Today 73 (12), 64 (2020); https://doi.org/10.1063/PT.3.4641

Quick Study

Physics Today 73 (12), 66–67 (2020); https://doi.org/10.1063/PT.3.4642

Wirelessly powered and mass manufactured, the dust-sized robots can crawl, survive harsh environments, and be injected through a hypodermic needle.

Back Scatter

Physics Today 73 (12), 68 (2020); https://doi.org/10.1063/PT.3.4643
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