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Issues
July 1987
ISSN 0031-9228
EISSN 1945-0699
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Letters
Search and Discovery
High May Not Need Phonons; Supercurrents Increase
Physics Today 40 (7), 17–21 (1987);
https://doi.org/10.1063/1.2820106
Articles
Mass Extinctions Caused by Large Bolide Impacts
Physics Today 40 (7), 24–33 (1987);
https://doi.org/10.1063/1.881078
Evidence indicates that the collision of Earth and a large piece of Solar System debris such as a meteoroid, asteroid or comet caused the great extinctions of 65 million years ago, leading to the transition from the age of the dinosaurs to the age of the mammals.
Why Do Stars Emit X Rays?
Physics Today 40 (7), 36–42 (1987);
https://doi.org/10.1063/1.881079
Careful study of our closest star, the Sun, suggests that bundles of twisted magnetic flux tubes extending from subsurface layers may account for the surprising prevalence of x rays from most rather ordinary stars.
AIP in 1986: An Annual Report
Physics Today 40 (7), 49–56 (1987);
https://doi.org/10.1063/1.881080
Long‐range planning for the American Institute of Physics focuses on providing an expanding range of services and products for its member societies and the physics community.
Washington Reports
Physics Community
New Products
Books
Manhattan: The Army and the Atomic Bomb and The Dragon's Tail: Radiation Safety in the Manhattan Project, 1942–1946
Physics Today 40 (7), 72–74 (1987);
https://doi.org/10.1063/1.2820118
My Daughter Beatrice: A Personal Memoir of Dr. Beatrice Tinsley, Astronomer
Physics Today 40 (7), 74–75 (1987);
https://doi.org/10.1063/1.2820120
News from APS
We Hear That
Obituaries
Calendar
France’s Oppenheimer
William Sweet
Making qubits from magnetic molecules
Stephen Hill
Learning to see gravitational lenses
Sebastian Fernandez-Mulligan