Thursday, December 6, 2007

Science, October 26, 2007


Cover
Decision-making involves the coordinated interaction of many brain areas, even for a rather simple game of chance. A special section examines the processes and structures that underlie decision-making -- from trivial choices to major life-changing decisions.

Amazon Forests Green-Up During 2005 Drought
Showing unexpected resilience, tropical forests in the Amazon apparently increased photosynthesis in response to the 2005 drought, according to satellite measurements.

Outward Transport of High-Temperature Materials Around the Midplane of the Solar Nebula
High-temperature grains formed near a protosun can be transported efficiently outward along the midplane of the early solar system, explaining how such grains occur in comets.

A Surface-Tailored, Purely Electronic, Mott Metal-to-Insulator Transition
Stresses created by broken symmetry at the surface of a layered oxide allow its surface to undergo a metal-to-insulator transition without a change in its overall structure.

Why Is Climate Sensitivity So Unpredictable?
The possibility that doubling atmospheric CO2 levels may increase global temperatures more than the expected 3 to 5 degrees Celsius is inherent in the climate system and can never be ruled out.

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