Science 8 December 2006: 1559.
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Policy Forum
RESEARCH AND DEVELOPMENT: Where Is the New Science in Corporate R&D?
Jerry Thursby and Marie Thursby
Science 8 December 2006: 1547-1548.
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Perspectives
PHYSICS: Microwave Cooling of an Artificial Atom
Irinel Chiorescu
Science 8 December 2006: 1549-1550.
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ASTRONOMY: Enhanced: A Ghostly Star Revealed in Silhouette
Pierre F. L. Maxted
Science 8 December 2006: 1550-1551.
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ASTRONOMY: Big Bang Points to Stellar Mix-Up
Philipp Podsiadlowski and Stephen Justham
Science 8 December 2006: 1551-1552.
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CHEMISTRY: Pulling Strings
Walter Fontana
Science 8 December 2006: 1552-1553.
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NEUROSCIENCE: Matters of Size
Charles Kopec and Roberto Malinow
Science 8 December 2006: 1554-1555.
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EVOLUTION: The Puzzle of Human Sociality
Robert Boyd
Science 8 December 2006: 1555-1556.
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ATMOSPHERE: An Ancient Carbon Mystery
Mark Pagani, Ken Caldeira, David Archer, and James C. Zachos
Science 8 December 2006: 1556-1557.
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Review
Five Rules for the Evolution of Cooperation
Martin A. Nowak
Science 8 December 2006: 1560-1563.
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Brevia
Ebola Outbreak Killed 5000 Gorillas
Magdalena Bermejo, José Domingo Rodríguez-Teijeiro, Germán Illera, Alex Barroso, Carles Vilà, and Peter D. Walsh
Science 8 December 2006: 1564.
Successive waves of Ebola virus infection and hunting pressure are threatening the great apes of West Africa with extinction.
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Research Articles
Engineering Yeast Transcription Machinery for Improved Ethanol Tolerance and Production
Hal Alper, Joel Moxley, Elke Nevoigt, Gerald R. Fink, and Gregory Stephanopoulos
Science 8 December 2006: 1565-1568.
Yeast genetically altered to tolerate higher ethanol and glucose concentrations may prove useful for biofuel production.
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Group Competition, Reproductive Leveling, and the Evolution of Human Altruism
Samuel Bowles
Science 8 December 2006: 1569-1572.
Early human practices requiring language and sophisticated cognition enhanced the contribution of altruism to group survival, perhaps selecting for altruistic traits.
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Present-Day Impact Cratering Rate and Contemporary Gully Activity on Mars
Michael C. Malin, Kenneth S. Edgett, Liliya V. Posiolova, Shawn M. McColley, and Eldar Z. Noe Dobrea
Science 8 December 2006: 1573-1577.
Images of Mars taken 7 years apart reveal 20 new impact craters, close to the predicted rate, some with gullies indicating the presence of flowing water in the past decade.
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Reports
A Brown Dwarf Mass Donor in an Accreting Binary
S. P. Littlefair, V. S. Dhillon, T. R. Marsh, Boris T. Gänsicke, John Southworth, and C. A. Watson
Science 8 December 2006: 1578-1580.
Accurate measurements of eclipses finally capture a white dwarf cannibalizing an unseen brown dwarf companion star, confirming long-standing predictions.
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Deep Mixing of 3He: Reconciling Big Bang and Stellar Nucleosynthesis
Peter P. Eggleton, David S. P. Dearborn, and John C. Lattanzio
Science 8 December 2006: 1580-1583.
Published online 26 October 2006 [DOI: 10.1126/science.1133065] (in Science Express Reports)
Three-dimensional models of giant stars show that deep convection of supposedly stable layers destroys 3He to levels consistent with the Big Bang predictions.
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Operation of a DNA Robot Arm Inserted into a 2D DNA Crystalline Substrate
Baoquan Ding and Nadrian C. Seeman
Science 8 December 2006: 1583-1585.
A mechanical DNA device mounted within a crystalline DNA lattice retains its functionality, providing a step toward nanoscale computation and manufacturing.
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Enzyme-Free Nucleic Acid Logic Circuits
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