Vol 310, Issue 5752
This Week in Science
Products & Materials
News of the Week
Essays on Science and Society
Cassini images reveal that the faint, supposedly concentric strands making up Saturn's delicate F ring actually form a spiral that winds at least three times around the planet.
The number of charged electrons along the length of variably doped silicon nanowires can be modulated during growth, producing devices to decode electronic addresses.
Electron transfer between proteins in biologic reactions occurs rapidly across adjoining proteins, slowly through thin water layers, and even more slowly if the water layer is thick.
CO2 levels, trapped deep in an Antarctic ice core, varied less between 650,000 and 400,000 years ago than they have since, consistent with that period's smaller temperature changes.
Methane levels varied less between 650,000 and 400,000 years ago than they have since; nitrous oxide levels also followed glacial climate swings, but in a more complex way.
One member of an immune protein family helps to process lipid antigens for display on the cell surface; the other members provide the surface binding sites for these lipids.
Genes resembling intron-rich human genes are found in a marine polychaete, indicating their presence in the bilateral ancestor and their secondary loss in other invertebrates.
Certain flatworms are able to regenerate damaged body parts because a protein possibly involved in RNA regulation of gene expression allows stem cells to produce new tissue.
A microRNA participates in the cell-cell interactions and biochemical feedback that specify the identity of vulva cells in a developing nematode.
Climate and social changes in Europe over the next 80 years are predicted to degrade ecosystems services such as biodiversity and fresh water, especially in the Mediterranean and mountainous regions.
Monkeys assign a subjective reward value to their choices when making decisions, and this value is coded by neurons in an area near the center of the brain.
A type of neuronal plasticity in the rat that may underlie persistent drug craving in humans depends on the uptake and sequestration of glutamate receptors.
A cell surface receptor at the neuromuscular junction is unexpectedly cleaved when bound by ligand, releasing a fragment that travels to the nucleus to control synapse formation.