Issues
From the Editor
Readers’ Forum
Search and Discovery
Three groups close the loopholes in tests of Bell’s theorem
Until now, the quintessential demonstration of quantum entanglement has required extra assumptions.
Thermodynamic simulations explain the Moon’s composition
According to the simulations, more than half of the Moon accreted from volatile-poor molten rock that orbited Earth for decades following a giant impact.
Ion channels facilitate long-distance communication among bacteria
The specialized membrane proteins’ function, puzzling in a single bacterial cell, becomes apparent when the cell joins a large colony.
Issues and Events
Europeans shine in weather forecasting
The US global model lags the performance of two European competitors in predicting weather up to two weeks ahead.
Crowdsourcing platform gets results
On the Zooniverse, data-analysis projects mesh public outreach and scientific discovery.
Puerto Rico’s fiscal woes threaten its scientific future
Cash-strapped physics departments in the island’s main university system cannot hire new researchers to replace the ones that retire or migrate.
ITER cost and schedule still not pinned down
Project partners will consider multiple budget scenarios before releasing new estimate.
Articles
Shape-programmable materials
Inspired by the insights of mathematician Carl Friedrich Gauss, scientists are engineering hydrogels and liquid-crystal-containing polymers that change from flat to curved in response to heat and other stimuli.
Facets of glass physics
Humans have been making glass for more than 3000 years. Despite that long history, new ways to understand the fundamental physics of glasses continue to emerge.
A perfect proposal
A 1950 grant application that helped launch hydrogen-line radio astronomy provides a model for the clarity, economy, and integrity attainable in such requests.
Books
The Story of Collapsing Stars: Black Holes, Naked Singularities, and the Cosmic Play of Quantum Gravity
New Products
Obituaries
James Richard Houck
Quick Study
Single-electron cyclotron radiation
Experiments that track the radiation emitted by a lone electron orbiting a magnetic field may, in time, reveal the effects of neutrino mass.