Mars Reconnaissance Orbiter

Water, Water, Not Everywhere?

Joanne Baker
Science 21 September 2007: 1705.
Summary »|   PDF »|  

Reports

A Closer Look at Water-Related Geologic Activity on Mars

A. S. McEwen, C. J. Hansen, W. A. Delamere, E. M. Eliason, K. E. Herkenhoff, L. Keszthelyi, V. C. Gulick, R. L. Kirk, M. T. Mellon, J. A. Grant, N. Thomas, C. M. Weitz, S. W. Squyres, N. T. Bridges, S. L. Murchie, F. Seelos, K. Seelos, C. H. Okubo, M. P. Milazzo, L. L. Tornabene, W. L. Jaeger, S. Byrne, P. S. Russell, J. L. Griffes, S. Martínez-Alonso, A. Davatzes, F. C. Chuang, B. J. Thomson, K. E. Fishbaugh, C. M. Dundas, K. J. Kolb, M. E. Banks, and J. J. Wray
Science 21 September 2007: 1706-1709.
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Athabasca Valles, Mars: A Lava-Draped Channel System

W. L. Jaeger, L. P. Keszthelyi, A. S. McEwen, C. M. Dundas, and P. S. Russell
Science 21 September 2007: 1709-1711.
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Meter-Scale Morphology of the North Polar Region of Mars

K. E. Herkenhoff, S. Byrne, P. S. Russell, K. E. Fishbaugh, and A. S. McEwen
Science 21 September 2007: 1711-1715.
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Accumulation and Erosion of Mars' South Polar Layered Deposits

Roberto Seu, Roger J. Phillips, Giovanni Alberti, Daniela Biccari, Francesco Bonaventura, Marco Bortone, Diego Calabrese, Bruce A. Campbell, Marco Cartacci, Lynn M. Carter, Claudio Catallo, Anna Croce, Renato Croci, Marco Cutigni, Antonio Di Placido, Salvatore Dinardo, Costanzo Federico, Enrico Flamini, Franco Fois, Alessandro Frigeri, Oreste Fuga, Emanuele Giacomoni, Yonggyu Gim, Mauro Guelfi, John W. Holt, Wlodek Kofman, Carlton J. Leuschen, Lucia Marinangeli, Paolo Marras, Arturo Masdea, Stefania Mattei, Riccardo Mecozzi, Sarah M. Milkovich, Antonio Morlupi, Jérémie Mouginot, Roberto Orosei, Claudio Papa, Tobia Paternò, Paolo Persi del Marmo, Elena Pettinelli, Giulia Pica, Giovanni Picardi, Jeffrey J. Plaut, Marco Provenziani, Nathaniel E. Putzig, Federica Russo, Ali Safaeinili, Giuseppe Salzillo, Maria Rosaria Santovito, Suzanne E. Smrekar, Barbara Tattarletti, and Danilo Vicari
Science 21 September 2007: 1715-1718.
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Density of Mars' South Polar Layered Deposits

Maria T. Zuber, Roger J. Phillips, Jeffrey C. Andrews-Hanna, Sami W. Asmar, Alexander S. Konopliv, Frank G. Lemoine, Jeffrey J. Plaut, David E. Smith, and Suzanne E. Smrekar
Science 21 September 2007: 1718-1719.
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This Week in Science

Editor summaries of this week's papers.
Science 21 September 2007: 1645.
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Editorial:
A Critical Vote Down Under

Ian Lowe
Science 21 September 2007: 1649.
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Editors' Choice

Highlights of the recent literature.
Science 21 September 2007: 1651.
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Science Podcast

Science 21 September 2007: 1773.
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NEW PRODUCTS

Science 21 September 2007: 1773.
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News of the Week

SEISMOLOGY: Continuing Indonesian Quakes Putting Seismologists on Edge

Richard A. Kerr
Science 21 September 2007: 1660-1661.
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SEISMOLOGY: Tsunami Warning System Shows Agility--and Gaps in Indian Ocean Network

Dennis Normile
Science 21 September 2007: 1661.
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ASTRONOMY: Arecibo Advocates Agitate to Reverse Planned NSF Cut

Andrew Lawler
Science 21 September 2007: 1663.
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PALEOANTHROPOLOGY: A New Body of Evidence Fleshes Out Homo erectus

Ann Gibbons
Science 21 September 2007: 1664.
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GENE THERAPY: Questions Remain on Cause of Death in Arthritis Trial

Jocelyn Kaiser
Science 21 September 2007: 1665.
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CLIMATE CHANGE: Panel Gives U.S. Program Mixed Grades

Richard A. Kerr
Science 21 September 2007: 1667.
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REGENERATIVE MEDICINE: Australian Scientist to Head California Stem Cell Effort

Constance Holden
Science 21 September 2007: 1667.
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ScienceScope

Science 21 September 2007: 1663.
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Random Samples

Science 21 September 2007: 1657.
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Newsmakers

Science 21 September 2007: 1659.
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News Focus

GENETICS: The Geneticist's Best Friend

Elizabeth Pennisi
Science 21 September 2007: 1668-1671.
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GENETICS: Europe Going to the Dogs

Elizabeth Pennisi
Science 21 September 2007: 1670.
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PLANETARY SCIENCE: Is Mars Looking Drier and Drier for Longer and Longer?

Richard A. Kerr
Science 21 September 2007: 1673.
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LINGUISTICS: Read My Slips: Speech Errors Show How Language Is Processed

Michael Erard
Science 21 September 2007: 1674-1676.
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EUROPEAN UNIVERSITIES: Barroso's Brainchild

Martin Enserink
Science 21 September 2007: 1676-1677.
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Letters

This Week's Letters

Science 21 September 2007: 1678.
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 Factory Flies Are Not Equal to Wild Flies

John S. Terblanche and Steven L. Chown
Science 21 September 2007: 1678.
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 Promoting Science and Technology from the Top

Arnoldo K. Ventura
Science 21 September 2007: 1678-1679.
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 How Old Is the Human Presence on Cyprus?

Alan H. Simmons and Rolfe D. Mandel
Science 21 September 2007: 1679.
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 Ethics and Refinement in Animal Research

I. Anna S. Olsson, Axel K. Hansen, and Peter Sandøe
Science 21 September 2007: 1680.
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 Corrections and Clarifications

Science 21 September 2007: 1682.
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Books et al.

COMPUTERS: A Classic Reconfigured

Brenda Laurel and Rob Tow
Science 21 September 2007: 1684-1685.
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HISTORY OF SCIENCE: Inventing Johannes Müller

Lynn K. Nyhart
Science 21 September 2007: 1685.
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Books Received

Science 21 September 2007: 1685.
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Policy Forum

MEDICINE: The Future of Personal Genomics

Amy L. McGuire, Mildred K. Cho, Sean E. McGuire, and Timothy Caulfield
Science 21 September 2007: 1687.
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Perspectives

IMMUNOLOGY: The Root of Platelet Production

Amy E. Geddis and Kenneth Kaushansky
Science 21 September 2007: 1689-1691.
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COMPUTER SCIENCE: Coding and Computing Join Forces

Bernard Chazelle
Science 21 September 2007: 1691-1692.
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ARCHAEOLOGY: Easter Island Revisited

Jared Diamond
Science 21 September 2007: 1692-1694.
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PHYSICS: Electrons Acquire a Split Personality in Bismuth

Andrew Huxley and Andrew G. Green
Science 21 September 2007: 1694-1695.
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BIOCHEMISTRY: How Cells Control Zinc Homeostasis

Dietrich H. Nies
Science 21 September 2007: 1695-1696.
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DEVELOPMENTAL BIOLOGY: Home for the Precious Few

Steve DiNardo and Robert E. Braun
Science 21 September 2007: 1696-1697.
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Review

Circuits with Light at Nanoscales: Optical Nanocircuits Inspired by Metamaterials

Nader Engheta
Science 21 September 2007: 1698-1702.
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Brevia

Feather Quill Knobs in the Dinosaur Velociraptor

Alan H. Turner, Peter J. Makovicky, and Mark A. Norell
Science 21 September 2007: 1721.
Regularly spaced knobs on a fossil ulna of a Velociraptor, a 1- to 2-meter-long theropod, are similar to knobs housing secondary feathers on modern birds. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Research Article

A Vasculature-Associated Niche for Undifferentiated Spermatogonia in the Mouse Testis

Shosei Yoshida, Mamiko Sukeno, and Yo-ichi Nabeshima
Science 21 September 2007: 1722-1726.
Published online 6 September 2007 [DOI: 10.1126/science.1144885] (in Science Express Research Articles)
Time-lapse imaging reveals that the stem cells that generate sperm are located near blood vessels in the testis of mice, a different organization than in invertebrates. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Reports

Universality Classes for Domain Wall Motion in the Ferromagnetic Semiconductor (Ga,Mn)As

M. Yamanouchi, J. Ieda, F. Matsukura, S. E. Barnes, S. Maekawa, and H. Ohno
Science 21 September 2007: 1726-1729.
Walls between magnetic domains can be moved by changing the magnetic field or the spin-polarized current, but each acts through a different exponential relationship. Abstract »|   Full Text »|   PDF »|  

Signatures of Electron Fractionalization in Ultraquantum Bismuth

Kamran Behnia, Luis Balicas, and Yakov Kopelevich
Science 21 September 2007: 1729-1731.
Published online 16 August 2007 [DOI: 10.1126/science.1146509] (in Science Express Reports)
At very high magnetic fields, charge transport in bismuth crystals behaves like a quantum fluid, an effect previously seen only in two-dimensional materials. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Free-Solution, Label-Free Molecular Interactions Studied by Back-Scattering Interferometry

Darryl J. Bornhop, Joey C. Latham, Amanda Kussrow, Dmitry A. Markov, Richard D. Jones, and Henrik S. Sørensen
Science 21 September 2007: 1732-1736.
Binding constants for biomolecules paired with ions or proteins can be determined using interferometry to detect changes in refractive indices upon mixing in small channels. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Asymmetric Catalysis of the Transannular Diels-Alder Reaction

Emily P. Balskus and Eric N. Jacobsen
Science 21 September 2007: 1736-1740.
A chiral catalyst facilitates carbon bond formation across a large ring, yielding several edge-sharing smaller rings and offering efficient synthesis of complex polycyclic molecules. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Spin Transition Zone in Earth's Lower Mantle

Jung-Fu Lin, György Vankó, Steven D. Jacobsen, Valentin Iota, Viktor V. Struzhkin, Vitali B. Prakapenka, Alexei Kuznetsov, and Choong-Shik Yoo
Science 21 September 2007: 1740-1743.
Iron in one of the major minerals in the lower mantle, (Mg,Fe)O, undergoes a gradual transition from a high-spin state to a denser low-spin state over a large pressure range. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

The Primitive Wrist of Homo floresiensis and Its Implications for Hominin Evolution

Matthew W. Tocheri, Caley M. Orr, Susan G. Larson, Thomas Sutikna, Jatmiko, E. Wahyu Saptomo, Rokus Awe Due, Tony Djubiantono, Michael J. Morwood, and William L. Jungers
Science 21 September 2007: 1743-1745.
Homo floresiensis, the enigmatic diminutive hominin from Flores, Indonesia, retains primitive wrist bones, implying that it is not closely related to modern humans. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Structure of the Zinc Transporter YiiP

Min Lu and Dax Fu
Science 21 September 2007: 1746-1748.
Published online 23 August 2007 [DOI: 10.1126/science.1143748] (in Science Express Reports)
The crystal structure of a bacterial membrane transporter reveals that it uses an unusual two-site, zinc-for-proton exchange mechanism. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Multicolor Super-Resolution Imaging with Photo-Switchable Fluorescent Probes

Mark Bates, Bo Huang, Graham T. Dempsey, and Xiaowei Zhuang
Science 21 September 2007: 1749-1753.
Published online 16 August 2007 [DOI: 10.1126/science.1146598] (in Science Express Reports)
A super-resolution imaging method that uses a family of multicolor fluorescent probes yields images of fixed cells with a spatial resolution of 20 to 30 nanometers. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Widespread Lateral Gene Transfer from Intracellular Bacteria to Multicellular Eukaryotes

Julie C. Dunning Hotopp, Michael E. Clark, Deodoro C. S. G. Oliveira, Jeremy M. Foster, Peter Fischer, Mónica C. Muñoz Torres, Jonathan D. Giebel, Nikhil Kumar, Nadeeza Ishmael, Shiliang Wang, Jessica Ingram, Rahul V. Nene, Jessica Shepard, Jeffrey Tomkins, Stephen Richards, David J. Spiro, Elodie Ghedin, Barton E. Slatko, Hervé Tettelin, and John H. Werren
Science 21 September 2007: 1753-1756.
Published online 30 August 2007 [DOI: 10.1126/science.1142490] (in Science Express Reports)
Unexpectedly, the symbiont Wolbachia can transfer segments of DNA consisting of individual genes or almost its entire genome to its insect or nematode hosts. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Draft Genome of the Filarial Nematode Parasite Brugia malayi

Elodie Ghedin, Shiliang Wang, David Spiro, Elisabet Caler, Qi Zhao, Jonathan Crabtree, Jonathan E. Allen, Arthur L. Delcher, David B. Guiliano, Diego Miranda-Saavedra, Samuel V. Angiuoli, Todd Creasy, Paolo Amedeo, Brian Haas, Najib M. El-Sayed, Jennifer R. Wortman, Tamara Feldblyum, Luke Tallon, Michael Schatz, Martin Shumway, Hean Koo, Steven L. Salzberg, Seth Schobel, Mihaela Pertea, Mihai Pop, Owen White, Geoffrey J. Barton, Clotilde K. S. Carlow, Michael J. Crawford, Jennifer Daub, Matthew W. Dimmic, Chris F. Estes, Jeremy M. Foster, Mehul Ganatra, William F. Gregory, Nicholas M. Johnson, Jinming Jin, Richard Komuniecki, Ian Korf, Sanjay Kumar, Sandra Laney, Ben-Wen Li, Wen Li, Tim H. Lindblom, Sara Lustigman, Dong Ma, Claude V. Maina, David M. A. Martin, James P. McCarter, Larry McReynolds, Makedonka Mitreva, Thomas B. Nutman, John Parkinson, José M. Peregrín-Alvarez, Catherine Poole, Qinghu Ren, Lori Saunders, Ann E. Sluder, Katherine Smith, Mario Stanke, Thomas R. Unnasch, Jenna Ware, Aguan D. Wei, Gary Weil, Deryck J. Williams, Yinhua Zhang, Steven A. Williams, Claire Fraser-Liggett, Barton Slatko, Mark L. Blaxter, and Alan L. Scott
Science 21 September 2007: 1756-1760.
The genome sequence of a parasitic nematode shows that, in comparison to its free-living relative Caenorhabditis elegans, its genes are adapted for its parasitic life-style. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

UHRF1 Plays a Role in Maintaining DNA Methylation in Mammalian Cells

Magnolia Bostick, Jong Kyong Kim, Pierre-Olivier Estève, Amander Clark, Sriharsa Pradhan, and Steven E. Jacobsen
Science 21 September 2007: 1760-1764.
Published online 2 August 2007 [DOI: 10.1126/science.1147939] (in Science Express Reports)
Epigenetic DNA methylation patterns that persist through cell division depend on a protein that binds to hemimethylated DNA and a methyltransferase. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

MicroRNA Inhibition of Translation Initiation in Vitro by Targeting the Cap-Binding Complex eIF4F

Géraldine Mathonnet, Marc R. Fabian, Yuri V. Svitkin, Armen Parsyan, Laurent Huck, Takayuki Murata, Stefano Biffo, William C. Merrick, Edward Darzynkiewicz, Ramesh S. Pillai, Witold Filipowicz, Thomas F. Duchaine, and Nahum Sonenberg
Science 21 September 2007: 1764-1767.
Published online 26 July 2007 [DOI: 10.1126/science.1146067] (in Science Express Reports)
In vitro, microRNAs can act to repress the initial step of protein translation. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Dynamic Visualization of Thrombopoiesis Within Bone Marrow

Tobias Junt, Harald Schulze, Zhao Chen, Steffen Massberg, Tobias Goerge, Andreas Krueger, Denisa D. Wagner, Thomas Graf, Joseph E. Italiano, Jr., Ramesh A. Shivdasani, and Ulrich H. von Andrian
Science 21 September 2007: 1767-1770.
Imaging of living bone marrow confirms that platelets form when long protrusions from sessile cells extend through the blood vessel wall and are then sheared by blood flow. Abstract »|   Full Text »|   PDF »|   Supporting Online Material »|  

Technical Comments

Comment on "Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft"

Maegan K. Spencer and Richard N. Zare
Science 21 September 2007: 1680.
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Response to Comment on "Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft"

Scott A. Sandford and Donald E. Brownlee
Science 21 September 2007: 1680.
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