15/02/2007

Clock Comparison Yields Clues to 'Constant' Change

Years of comparisons among the world’s best atomic clocks—based on different atoms—have established the most precise limits ever achieved in the laboratory for detecting possible changes in so-called “constants” ...

Disorder May Be in Order for ‘Spintronic’ Devices

Physicists at JILA are using ultrashort pulses of laser light to reveal precisely why some electrons, like ballet dancers, hold their spin positions better than others—work that may help improve spintronic devices, which ...

High-Frequency Cryocooler Is Tiny, Cold and Efficient

A new cryogenic refrigerator has been demonstrated at the National Institute of Standards and Technology that operates at twice the usual frequency, achieving a long-sought combination of small size, rapid cooling, low temperatures ...

Getting on your nerves... and repairing them

Here is some news that will certainly get on people's nerves: In a study to be published in the March 2007 issue of The FASEB Journal, scientists from East Carolina University report that a key molecular mechanism, RNA interference ...

The Moon is a School for Exploration

NASA has been exploring space for nearly half a century, often with stupendous success. Yet "there's one thing we really don't know: what is the best way to explore a planet?" declares Paul D. Spudis, a senior planetary scientist ...

Marine Bacteria with a Hybrid Engine

What was considered a breakthrough in the automobile industry almost five years ago is in fact a million year old success story of nature - the ability to use a mix of different energy sources.

Scientists Find Lakes Under Antarctica

Scientists using NASA satellites have discovered an extensive network of waterways beneath a fast-moving Antarctic ice stream that provide clues as to how "leaks" in the system impact sea level and the world's largest ice ...

More Evidence Found for Water on Mars

A spacecraft recently arrived at Mars has provided new evidence that fluids, likely including water, once flowed widely through underlying bedrock in a canyon that is part of the great Martian rift valley.

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