Contents
Vol 314, Issue 5799
Contents
This Week in Science
Editorial
Editors' Choice
NetWatch
Departments
Products & Materials
News of the Week
ScienceScope
Random Samples
Newsmakers
News Focus
Letters
Books
Education Forum
Perspectives
Association Affairs
Review
Brevia
- A Fossil Bee from Early Cretaceous Burmese Amber
A fossil bee carrying traces of pollen in 100-million-year-old amber shows that bees originated in the Cretaceous at a time of rapid diversification of angiosperms.
Research Article
- BKCa-Cav Channel Complexes Mediate Rapid and Localized Ca2+-Activated K+ Signaling
Calcium channels are bound to potassium channels, allowing direct delivery of calcium to trigger potassium currents that control firing patterns and neurotransmitter release.
Reports
- Anatomy of a Flaring Proto-Planetary Disk Around a Young Intermediate-Mass Star
A star more massive than the Sun hosts a flaring disk of dust and gas, consistent with some models for the formation of disks.
- The Phase-Dependent Infrared Brightness of the Extrasolar Planet ʊ Andromedae b
An extrasolar planet orbiting rapidly around a nearby star shows hot day and cold night sides, implying that little horizontal energy transport occurs in its atmosphere.
- Brownian Motion of an Ellipsoid
The Brownian motion of ellipsoid particles is initially anisotropic due to rotational and translational effects, in contrast to that of classically studied spheres.
- α-Hydroxy and α-Amino Acids Under Possible Hadean, Volcanic Origin-of-Life Conditions
Amino acids can form by hydration of CO and/or cyanide catalyzed by iron and nickel clusters under conditions that plausibly mimic volcanic vents on early Earth.
- Interface Mobility from Interface Random Walk
A simulation shows that impurities enhance the absolute mobility of a flat grain boundary, affecting the microstructure of materials, even with almost no driving force.
- X-ray–Induced Dissociation of H2O and Formation of an O2–H2 Alloy at High Pressure
At high pressures, low-energy x-ray radiation causes water ice to dissociate to oxygen and hydrogen, which then form a stable solid alloy.
- Colloid Transport of Plutonium in the Far-Field of the Mayak Production Association, Russia
A study at a nuclear weapons waste site in Russia shows that plutonium can be transported rapidly in groundwater, primarily via iron-oxide colloids.
- Thrice Out of Africa: Ancient and Recent Expansions of the Honey Bee, Apis mellifera
Gene diversity in European honey bees suggests that they emerged at least twice from Africa and that American killer bee populations arose from three distinct lineages.
- Functional CpG Methylation System in a Social Insect
The honey bee is the first insect shown to possess a functional, vertebrate-like DNA methylation system.
- From the Genome to the Proteome: Uncovering Peptides in the Apis Brain
The genome of the honey bee contains nearly 200 potential brain peptides, which may be important in regulating this insect's social behavior.
- Bacterial Taxa That Limit Sulfur Flux from the Ocean
Cyanobacteria and diatoms assimilate some of the organic sulfur produced by other phytoplankton and thus prevent its release to the atmosphere where it would otherwise influence climate.
- Dimethylsulfoniopropionate Uptake by Marine Phytoplankton
Cyanobacteria and diatoms assimilate some of the organic sulfur produced by other phytoplankton and thus prevent its release to the atmosphere where it would otherwise influence climate.
- A Centrosome-Independent Role for γ-TuRC Proteins in the Spindle Assembly Checkpoint
Centrosomal proteins are important for cell cycle progression, but their role does not require their presence in the centrosome itself.
- Odorant Receptor–Derived cAMP Signals Direct Axonal Targeting
The organization of the developing mouse olfactory bulb along the anterior-posterior axis is controlled by cyclic AMP signaling, which then affects gene expression.
- Molecular Phylogeny and Evolution of Morphology in the Social Amoebas
Morphology is strikingly at odds with molecular data for classification of cellular slime molds, suggesting that a full revision of their phylogeny is needed.
- Control of Peripheral Nerve Myelination by the ß-Secretase BACE1
An enzyme that cleaves the precursor of the amyloid peptide that accumulates in Alzheimer's disease unexpectedly also regulates the myelination of nerves.
Technical Comments
