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Science RSS FeedsThis Week in Science - Water and Ice | A Not-So-Happy Anniversary | The Making of the Sahara | Nanoscale Thermal Motors | Quantum Dot Optoelectronics | Pre-Clovis South | and Pre-Clovis North | Divide and Conquer | Birds of a Feather Adapt Together | Home Is Where the Hearth Is | Identifying Receptor-Ligand Pairs | Lights Out | Viral Subversion Strategy | Wholesale Heat Shock...Feed Source: www.sciencemag.org Editors' Choice - CLIMATE SCIENCE: Ringing in the Old Years | CELL BIOLOGY: Inflammation Activates Neurons | BIOPHYSICS: Polar Preferences | PHYSICS: Guiding Gamma Rays | CHEMISTRY: Can SWNTs Swim Apart? | NEUROSCIENCE: Are You a Morning Person? | PSYCHOLOGY: Seen in a Positive Light... Science Scope - FDA Drops Helsinki Rules | The Next Lyme Battle | Clearing the Air | Korea Targets Basic Science | Solar Sensor Back on Board | Not So Presidential... Random Samples - PLACE YOUR BATS | TIME 2 WTR UR COTTN | HANDFULS OF SATELLITES | TALK SHOW... Newsmakers - THREE Q'S | IN PRINT | IN BRIEF | NONPROFIT WORLD | DEATHS... [EDITORIAL] AIDS and the Next 25 Years - Author: Alan Bernstein... [NEWS] U.S. SCIENCE POLICY: Going From RAGS to Riches Is Proving to Be Very Difficult - A parade of speakers last week gave the U.S. government failing grades for not heeding the recommendations in Rising Above the Gathering Storm calling for bigger research budgets, more undergraduate scholarships and graduate fellowships, changes in immigration policy, and an improved environment for innovation.Author: Jeffrey Mervis... [NEWS] ARCHAEOLOGY: Ancient Algae Suggest Sea Route for First Americans - A paper on page 784 of this week's issue of Science provides some support for the hypothesis that the first Americans took the coastal route from Asia rather than traveling inland.Author: Michael Balter... [NEWS] GENOMICS: Genome Speaks to Transitional Nature of Monotremes - An analysis of the platypus genome reveals how its DNA is an amalgam of mammalian and reptilian features.Author: Elizabeth Finkel... [NEWS] EVOLUTION IN THE SCHOOLS: States Push Academic Freedom Bills - Politicians in five U.S. states are pushing bills to enable educators to teach alternatives to evolution by protecting their "right" to discuss with students the idea of intelligent design.Author: Yudhijit Bhattacharjee... [NEWS] INTELLECTUAL PROPERTY: Chinese Province Crafts Pioneering Law to Thwart Biopiracy - Officials in southern China's Guizhou Province are hoping to head off future attempts at "biopiracy"--the plunder of natural resources--by enshrining the protection of indigenous knowledge into law.Author: Richard Stone... [NEWS FOCUS] NEUROBIOLOGY: The Roots of Morality - Neurobiologists, philosophers, psychologists, and legal scholars are probing the nature of human morality using a variety of experimental techniques, including one reported online this week in Science, and moral challenges.Author: Greg Miller... [NEWS FOCUS] PLANETARY SCIENCE: To Touch the Water of Mars and Search for Life's Abode - The Phoenix lander will soon arrive at Mars to perform the first analyses of martian water and to probe the rocky polar soil as a habitat for life; it has been a struggle.Author: Richard A. Kerr... [NEWS FOCUS] SCIENCE AND SOCIETY: Talk Nerdy to Me - A surprise hit, the new TV comedy The Big Bang Theory plumbs science for laughs, thanks to aid from physicist David Saltzberg and friend.Author: Karen Heyman... [NEWS FOCUS] CONSERVATION BIOLOGY: Into the Wild: Reintroduced Animals Face Daunting Odds - Researchers in the emerging field of wildlife reintroduction battle hawks, habitat loss, and poachers to give animals a second chance.Author: Virginia Morell... [LETTERS] Lost in Transliteration - Author: Lixin Wang... [LETTERS] Evolution and Faith: Empathy Is Misplaced - Author: Craig W. Stevens... [LETTERS] Evolution and Faith: Empathy Is Crucial - Author: Andrew Whipple... [LETTERS] Data Discrepancies in Solar-Climate Link - Author: Raymond T. Pierrehumbert... [LETTERS] Living Up to Ancient Civilizations - Author: Geoffrey P. Glasby... [TECHNICAL COMMENT] Comment on ?Absence of Cooling in New Zealand and the Adjacent Ocean During the Younger Dryas Chronozone? - Authors: Patrick J. Applegate, Thomas V. Lowell, Richard B. Alley... [TECHNICAL RESPONSE] Response to Comment on ?Absence of Cooling in New Zealand and the Adjacent Ocean During the Younger Dryas Chronozone? - Authors: Timothy T. Barrows, Scott J. Lehman, L. Keith Fifield, Patrick De Deckker... [BOOKS ET AL.] HISTORY OF SCIENCE: Protesting Scientists - The author examines the postwar growth of scientists' activism against the bonds that linked U.S. science to the military and governmental power.Author: Audra J. Wolfe... [BOOKS ET AL.] TECHNOLOGY: Designers and Builders - Rather than a continuous narrative or theoretical analysis, this profusely illustrated exploration of the relations between architects and engineers offers six extended essays on topics ranging from the impact of military construction and organization to training in the two professions.Author: Thomas P. Hughes... [POLICY FORUM] PUBLIC HEALTH: Reassessing HIV Prevention - The largest investments in AIDS prevention targeted to the general population are being made in interventions where the evidence for large-scale impact is uncertain.Authors: Malcolm Potts, Daniel T. Halperin, Douglas Kirby, Ann Swidler, Elliot Marseille, Jeffrey D. Klausner, Norman Hearst, Richard G. Wamai, James G. Kahn, Julia Walsh... [PERSPECTIVES] PHYSICS: Designer Atomic Nuclei - New isotopes with unusual decay modes or number of neutrons are having impacts in areas ranging from astrophysics to medicine.Author: Bradley M. Sherrill... [PERSPECTIVES] ECOLOGY: How the Sahara Became Dry - A continuous lake record elucidates how Saharan climate changed gradually from humid to today's desert conditions.Author: Jonathan A. Holmes... [PERSPECTIVES] AIDS/HIV: A STEP into Darkness or Light? - The recent failure of a vector-based HIV vaccine may be explained by individual subjects' immune capacity and genetics.Authors: John P. Moore, P. J. Klasse, Matthew J. Dolan, Sunil K. Ahuja... [PERSPECTIVES] BIOCHEMISTRY: Tinkering with Acellular Division - Self organization of proteins involved in bacterial cell division is demonstrated in vitro.Author: Joe Lutkenhaus... [PERSPECTIVES] MATERIALS SCIENCEL: High-Frequency Chip Connections - Advanced interconnects will be required to keep pace with the increasing speed of future microelectronics.Authors: Todd J. Spencer, Tyler Osborn, Paul A. Kohl... [PERSPECTIVES] BIOGEOCHEMISTRY: News About Nitrogen - Discoveries of microbial pathways, players, and population dynamics challenge conventional models of the nitrogen cycle.Authors: M. Claire Horner-Devine, Adam C. Martiny... [REVIEWS] Toward an AIDS Vaccine - Authors: Bruce D. Walker, Dennis R. Burton... [RESEARCH ARTICLES] Climate-Driven Ecosystem Succession in the Sahara: The Past 6000 Years - A climate record from lake sediments in Chad shows that the Sahara changed gradually from a tropical ecosystem to a desert, not abruptly as implied by Atlantic dust layers.Authors: S. Kröpelin, D. Verschuren, A.-M. Lézine, H. Eggermont, C. Cocquyt, P. Francus, J.-P. Cazet, M. Fagot, B. Rumes, J. M. Russell, F. Darius, D. J. Conley, M. Schuster, H. von Suchodoletz, D. R. Engstrom... [REPORTS] Controlled Phase Shifts with a Single Quantum Dot - A single quantum dot coupled to a photonic crystal can be used to shift the phase of light by up to ?/4 radians at the single photon level, as needed for quantum logic operations.Authors: Ilya Fushman, Dirk Englund, Andrei Faraon, Nick Stoltz, Pierre Petroff, Jelena Vu?kovi?... [REPORTS] Conditional Dynamics of Interacting Quantum Dots - Controlled coherent manipulation is realized in a pair of self-assembled quantum dots: The optical response of one depends on the state of the other.Authors: Lucio Robledo, Jeroen Elzerman, Gregor Jundt, Mete Atatüre, Alexander Högele, Stefan Fält, Atac Imamoglu... [REPORTS] Subnanometer Motion of Cargoes Driven by Thermal Gradients Along Carbon Nanotubes - A segment of the outer shell of a multiwall carbon nanotube can move back and forth in response to a thermal gradient created by electrical current passing through the nanotube.Authors: Amelia Barreiro, Riccardo Rurali, Eduardo R. Hernández, Joel Moser, Thomas Pichler, László Forró, Adrian Bachtold... [REPORTS] Fracture Propagation to the Base of the Greenland Ice Sheet During Supraglacial Lake Drainage - A large lake on the surface of the Greenland Ice Sheet drained out through and along the base of the Ice Sheet within 2 hours, revealing an efficient basal hydrological system.Authors: Sarah B. Das, Ian Joughin, Mark D. Behn, Ian M. Howat, Matt A. King, Dan Lizarralde, Maya P. Bhatia... [REPORTS] Seasonal Speedup Along the Western Flank of the Greenland Ice Sheet - Measurements of ice motion from Greenland show that summer meltwater accelerates ice sheet flow by 50 to 100% overall but has less effect in the faster outlet glaciers.Authors: Ian Joughin, Sarah B. Das, Matt A. King, Ben E. Smith, Ian M. Howat, Twila Moon... [REPORTS] Monte Verde: Seaweed, Food, Medicine, and the Peopling of South America - Carbon-14 dates on seaweed brought to Monte Verde, Chile, show that the site was used 14,000 years ago and that the earliest New World people consumed marine resources.Authors: Tom D. Dillehay, C. Ramírez, M. Pino, M. B. Collins, J. Rossen, J. D. Pino-Navarro... [REPORTS] DNA from Pre-Clovis Human Coprolites in Oregon, North America - Fossil human feces from an Oregon cave predate the Clovis culture by about 1000 years, and DNA from the feces marks the presence of Native Americans in North America.Authors: M. Thomas P. Gilbert, Dennis L. Jenkins, Anders Götherstrom, Nuria Naveran, Juan J. Sanchez, Michael Hofreiter, Philip Francis Thomsen, Jonas Binladen, Thomas F. G. Higham, Robert M. Yohe II, Robert Parr, Linda Scott Cummings, Eske Willerslev... [REPORTS] Spatial Regulators for Bacterial Cell Division Self-Organize into Surface Waves in Vitro - Two proteins that define the plane of cell division self-organize into waves and spirals on a flat membrane, suggesting that these patterns underlie their function in vivo.Authors: Martin Loose, Elisabeth Fischer-Friedrich, Jonas Ries, Karsten Kruse, Petra Schwille... [REPORTS] Reconstitution of Contractile FtsZ Rings in Liposomes - A tubulin homolog from prokaryotes can, without other proteins, assemble into rings around liposomes and constrict, suggesting a primordial cell division mechanism.Authors: Masaki Osawa, David E. Anderson, Harold P. Erickson... [REPORTS] Architecture of a Charge-Transfer State Regulating Light Harvesting in a Plant Antenna Protein - To protect itself from oxidative damage in bright light, photosystem II operates a tunable shunt that directs excess energy to a yellow accessory pigment that is abundant in corn.Authors: Tae Kyu Ahn, Thomas J. Avenson, Matteo Ballottari, Yuan-Chung Cheng, Krishna K. Niyogi, Roberto Bassi, Graham R. Fleming... [REPORTS] Phosphorylation of Retinoblastoma Protein by Viral Protein with Cyclin-Dependent Kinase Function - A human cytomegalovirus protein takes control of the host cell cycle by mimicking a cell cycle kinase that phosphorylates and inactivates a tumor suppressor.Authors: Adam J. Hume, Jonathan S. Finkel, Jeremy P. Kamil, Donald M. Coen, Michael R. Culbertson, Robert F. Kalejta... [REPORTS] Adaptive Phenotypic Plasticity in Response to Climate Change in a Wild Bird Population - A 47-year study of great tits in Britain shows that the ability of individual birds to shift their breeding date has enabled the species to thrive as climate has changed.Authors: Anne Charmantier, Robin H. McCleery, Lionel R. Cole, Chris Perrins, Loeske E. B. Kruuk, Ben C. Sheldon... [REPORTS] Temperature Sensing by an Olfactory Neuron in a Circuit Controlling Behavior of C. elegans - An olfactory neuron in Caenorhabditis elegans also senses the ambient temperature and is necessary for worms' propensity to seek out the temperature at which they were raised.Authors: Atsushi Kuhara, Masatoshi Okumura, Tsubasa Kimata, Yoshinori Tanizawa, Ryo Takano, Koutarou D. Kimura, Hitoshi Inada, Kunihiro Matsumoto, Ikue Mori... [REPORTS] Discovery of a Cytokine and Its Receptor by Functional Screening of the Extracellular Proteome - A systematic, functional screen of extracellular proteins in yeast identified a previously unknown receptor-ligand pair: the cytokine interleukin-34 and its receptor.Authors: Haishan Lin, Ernestine Lee, Kevin Hestir, Cindy Leo, Minmei Huang, Elizabeth Bosch, Robert Halenbeck, Ge Wu, Aileen Zhou, Dirk Behrens, Diane Hollenbaugh, Thomas Linnemann, Minmin Qin, Justin Wong, Keting Chu, Stephen K. Doberstein, Lewis T. Williams... [REPORTS] Regulation of the Cellular Heat Shock Response in Caenorhabditis elegans by Thermosensory Neurons - Activation of a heat-sensitive sensory neuron in the worm Caenorhabditis elegans unexpectedly triggers a heat-shock response throughout the animal.Authors: Veena Prahlad, Tyler Cornelius, Richard I. Morimoto... [DEPARTMENTS] Science Podcast - Author: ... Copyright © 2008, Magic Maldives. All Rights Reserved. |