21 November 2008
Vol 322, Issue 5905
  • Special Feature

  • Contents

    • This Week in Science

    • Editorial

    • Editors' Choice

    • Podcasts

      • Science Podcast

        The 21 November 2008 show includes classifying native and nonnative Galápagos plant species, speeding up DNA sequencing, scientists as financial analysts, and more.

    • Products & Materials

    • News of the Week

      • Excess Particles From Space May Hint at Dark Matter

        An unexpected abundance of high-energy electrons from space could be evidence of particles of dark matter--the weighty and mysterious stuff whose gravity holds the galaxies together. But if the sightings really do point to dark matter, then physicists may have to revise their ideas about what the stuff is.

      • Malaria Drugs, the Coca-Cola Way

        On 7 November, the Board of the Global Fund to Fight AIDS, Tuberculosis and Malaria voted to adopt a new financing system aimed at bringing the best malaria drugs at rock-bottom prices to the local private-sector stores where most Africans buy their drugs--by letting the market do the work.

      • Study Shows How Degraded Surroundings Can Degrade Behavior

        In a series of cleverly designed experiments reported in a paper published online by Science this week, researchers found that if people see one norm or rule being violated (such as graffiti or a vehicle parked illegally), they're more likely to violate others--such as littering, or even stealing.

      • The New Groove in Science Aid: South-South Initiatives

        In addition to helping to close the divide between the research capabilities of the northern and southern hemispheres, the 871-member Academy of Sciences for the Developing World is now focusing on another divide: the widening gap between the South's scientific haves and have-nots.

    • ScienceScope

    • Random Samples

    • Newsmakers

    • News Focus

      • World Oil Crunch Looming?

        Even those who believe there's plenty of oil left in the ground to meet rising demand are warning that the final crisis could come uncomfortably soon.

      • Cloudy Future for Europe's Space Plans

        A string of successful missions had the European Space Agency riding high and making ambitious plans, but the worldwide financial downturn may bring it back to Earth.

      • Reaching for the Stars in Romania

        A small association of Romanian scientists, many of them working abroad, is fed up with the slow pace of reforms in their country. And politicians are paying attention.

      • At Home in Bucharest, for Better and for Worse

        In the late 1980s, communist dictator Nicolae Ceauşescu sought to demolish the Institute of Cellular Biology and Pathology (ICBP) to make way for his "House of the People." Then came the Christmas revolution of 1989. Ceauşescu didn't survive; ICBP did.

    • Letters

    • Books

      • Who Scientists Are Now

        Shapin's account of the development and current practice of the profession of science spotlights the researchers in the trenches rather than the big thinkers.

      • Organic and GM—Why Not?

        Writing for nonspecialists, Ronald (a rice geneticist) and Adamchak (an organic farmer) argue that the best path to sustainable food production lies through a careful combination of organic farming and genetically engineered plants.

      • Global Perspectives

        Using his sixfold perspective, Termes paints optical illusory scenes on the surfaces of spheres.

    • Policy Forum

    • Perspectives

      • Interrogating Molecules

        Attosecond laser pulses can reveal the complex electronic processes occurring within molecular systems.

      • Brain Wnts for Blood Vessels

        Development of the blood-brain barrier in mammals starts in the embryo, through specific molecules that induce vascular development in the neural tube.

      • Rogue Insect Immunity

        Insects use a variety of strategies to fight pathogens at different stages of infection, which may guide antimicrobial development for human use.

    • Review

    • Brevia

      • Fossil Pollen as a Guide to Conservation in the Galápagos

        Fossil pollen shows that six plant species in the Galápagos, presumed to be invasive, had actually been native to the islands for thousands of years before human colonization.

    • Research Articles

    • Reports

      • The Fermi Gamma-Ray Space Telescope Discovers the Pulsar in the Young Galactic Supernova Remnant CTA 1

        The Fermi Space Telescope has detected a gamma-ray pulsar associated with a young supernova remnant, implying that such stars may be unidentified gamma-ray sources.

      • Ab Initio Determination of Light Hadron Masses

        A quantum chromodynamics calculation that includes a full description of quarks and their interactions accurately determines the masses of protons, neutrons and other light hadrons.

      • High Harmonic Generation from Multiple Orbitals in N2

        Electron ejection from multiple N2 orbitals, controlled by the molecule's orientation relative to a laser, produces attosecond light spectra that can reveal molecular dynamics.

      • Radar Sounding Evidence for Buried Glaciers in the Southern Mid-Latitudes of Mars

        Radar data from the Mars Reconnaissance Orbiter show that a series of lobate landforms at low latitudes are composed primarily of massive ice covered by debris.

      • Selfish Genetic Elements Promote Polyandry in a Fly

        Genes that confer a deleterious sex ratio in Drosophila also decrease male fertility and promote repetitive mating in females, providing a possible explanation of polyandry.

      • Regulation of Pancreatic β Cell Mass by Neuronal Signals from the Liver

        In obese mice, fat tissue stimulates proliferation of insulin-producing pancreatic cells via a neural relay through the liver, contributing to symptoms of metabolic syndrome.

About The Cover

Cover image expansion

COVER X-rays emerge with varying intensity (red/green wave) as an electron is pulled out of and then pushed back into a vibrating N2O4 molecule by an intense laser field. The pattern reveals real-time dynamic changes in electronic spatial configurations, or orbitals, at the compressed (left blue orbital) and stretched (right blue orbital) limits of the vibration cycle. See page 1207. Image: Greg Kuebler, JILA/University of Colorado