Issues
Readers’ Forum
Commentary: Study highlights ethical ambiguity in physics
Search and Discovery
Laser beam remodels liquid crystals on the fly
The laser can be used like a stylus to imprint microdomains of arbitrary shape and prescribed orientation.
Lawrencium’s ionization potential, atom by atom
Researchers in Japan have begun probing the atomic physics of elements that can be produced only in minute quantities.
Tobacco cells infused with carbon nanotubes feel the heat
The composite is hundreds of times more electrically sensitive to temperature than the best previous materials used for thermal sensors.
The neutron and proton weigh in, theoretically
By adding electromagnetic effects to quantum chromodynamics calculations, theorists have achieved a leap in accuracy.
Remarkable gravitational lensing by the galaxy cluster Abell 3827
The distorted image of a background galaxy may be a record of frictional dark-matter interactions.
Issues and Events
Synchrotrons round the bend to make cheaper, better x rays
After a slow start, a technique that promises deep sample penetration and improved spatial resolution is catching on fast.
Carbon-ion cancer therapy shows promise
Radiation-resistant tumors are targets for heavy-ion particles. But high capital costs have prevented construction of treatment facilities in the US.
A disarmament agenda
Three members of an independent multinational body that analyzes issues related to nuclear disarmament, arms control, and nonproliferation share their views.
Articles
Biomimetics: Lessons on optics from nature’s school
The spectacular colors of living creatures are often produced by intricate arrays of photonic elements, including some that researchers wouldn’t otherwise have thought of.
On the belated discovery of fission
A remarkable sequence of missteps, misfortune, and oversights delayed the discovery of nuclear fission until the eve of World War II—and likely altered history’s course.
Iron-based superconductors, seven years later
Discovery of the new materials raised researchers’ hopes of solving the riddle of high-temperature superconductivity. But the unexpectedly diverse systems turned out to possess their own treasure trove of unusual physics that continues to challenge condensed-matter theorists.
Books
Galactic Encounters: Our Majestic and Evolving Star-System, from the Big Bang to Time’s End
New Products
Obituaries
Tullio Eugenio Regge
Juerg Xaver Saladin
Charles Hard Townes
Quick Study
Salty solutions
As Earth’s population grows and fresh water becomes an ever more precious resource, scientists and engineers are working to increase the efficiency and decrease the cost of desalination.