Vol 322, Issue 5905
This Week in Science
Products & Materials
News of the Week
A recent slowdown in the processing of U.S. visas for foreign scientists and some seemingly arbitrary visa denials have prompted a fresh look at how to streamline the process.
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.
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.
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.
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.
Systems biologists describe online in Science this week how fluorescent markers and a time-lapse microscope have allowed them an unprecedented view of the fluctuating locations and levels of about 1000 proteins in individual human cancer cells.
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.
The caterpillar-hijacking fungus Cordyceps sinensis is touted as a natural Viagra. But overharvesting has put the peculiar parasite's back against the wall.
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.
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.
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.
Ab initio calculations of the proton and neutron masses have now been achieved, a milestone in a 30-year effort of theoretical and computational physics.
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.
Electrons can be ejected from multiple orbitals of N2O4 by exploiting different stages in its excited vibrations, yielding an attosecond light probe of molecular dynamics.
The ligand binding pocket of the caffeine-binding human adenosine receptor has a different position and orientation than that of other G protein–linked receptors.
- 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.
The MAGIC telescope has detected higher-energy, pulsed gamma rays from the Crab pulsar and a threshold suggesting that they are emitted from the outer magnetosphere.
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.
Imaging with single electrons can track structural dynamics of gold and graphite in real space with femtosecond temporal resolution and angstrom spatial resolution.
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 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.
Within a fossil bivalve genus, evolution tended to occur as a random walk at the highest latitudes and to be in stasis mode in deep marine environments.
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.
A reaction-diffusion model involving regulatory molecules and a microtubule-stabilizing phosphoprotein predicts the spatial distribution of microtubules during cell division.
In mice, two specialized ligands for a key developmental signaling pathway are produced by neuroepithelial cells and direct endothelial cells to form the blood-brain barrier.
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.
As successive populations of protists have caused summer red tides in France, each has been killed off by a distinct, persistent parasite, establishing a self-regulating ecosystem.
Flies fight some infections by quickly engulfing bacteria in phagocytic cells then deploying antimicrobial peptides, a system that avoids bacterial resistance.
Over the past 30 years, scientific papers have become increasingly likely to be written by teams of authors from more than one of a small number of elite universities.