Issues
From the Editor
Readers’ Forum
Search and Discovery
Quantum entanglement reaches new heights
The satellite-based distribution of entangled photons to cities 1200 km apart bolsters prospects for a global quantum communication network.
Quantum gases cooled to long-range antiferromagnetic order
The observation of a checkerboard pattern in a lattice of ultracold atoms is a sign of even more exciting experiments to come.
Giant undersea craters were blown out by decomposing methane hydrates
Although the craters likely formed about 12 000 years ago, methane is still leaking profusely around and between them.
Issues and Events
Massive machine gears up to weigh nearly massless particles
An experiment in Germany looks for missing electron energy to infer neutrino rest mass.
In the digital age, physics students and professors prefer paper textbooks
Whether electronic textbooks become more popular may depend on making them more interactive and user-friendly.
Atmospheric research in the Rocky Mountain foothills
As an NSF-funded center approaches its 60th birthday, scientific and fiscal challenges lie ahead.
Articles
Why is the Sun’s corona so hot? Why are prominences so cool?
Over the past several decades, solar physicists have made steady progress in answering the two long-standing questions, but puzzles remain.
Mobilizing US physics in World War I
In applying their research to wartime problems, US physicists changed the relationship between physics, the military, and the government.
Cochlear implants and electronic hearing
The first medical device to restore a human sense, a cochlear implant converts sound into a train of current pulses that directly stimulate the auditory nerve of a profoundly deaf ear.
Books
Maxwell’s Enduring Legacy: A Scientific History of the Cavendish Laboratory
New Products
Obituaries
Roger Wolfe Cohen
Kwok-Yung Lo
Gary Steigman
Paul Frederick Zweifel
Quick Study
Interplanetary sand traps
Images from the asteroid Itokawa reveal unexpected seas of sand. New research suggests that the origin of those seas may be known to every golfer: It is easy to get trapped in sand, but hard to get out.