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The Case of the Unsolved Crime Decline

Criminologists have not yet cracked the case, but they now know more about why U.S. crime rates plummeted in the 1990s--and how to help keep them down

By Richard Rosenfeld

Better Displays with Organic Films

Light-emitting organic materials offer brighter and more efficient displays than LEDs. And you'll be able to unroll them across a tabletop

By Webster E. Howard

Four Keys to Cosmology

The big bang theory works better than ever. If only cosmologists could figure out that mysterious acceleration....

By George Musser

From Slowdown to Speedup

Distant supernovae are revealing the crucial time when the expansion of the universe changed from decelerating to accelerating

By Adam G. Riess and Michael S. Turner

Insights into Shock

Still a last step before death for thousands of people, shock is shedding some of its medical mystery and becoming more treatable

By Donald W. Landry and Juan A. Oliver

Out of the Darkness

Maybe cosmic acceleration isn't caused by dark energy after all but by an inexorable leakage of gravity out of our world

By Georgi Dvali

Reading the Blueprints of Creation

The latest maps of the cosmos have surveyed hundreds of thousands of galaxies, whose clustering has grown from primordial fluctuations

By Michael A. Strauss

The Cosmic Symphony

New observations of the cosmic microwave background radiation show that the early universe resounded with harmonious oscillations

By Wayne Hu and Martin White


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