The method to the madness of quasicrystals has been a mystery to scientists. Quasicrystals are solids whose atoms aren't arranged in a repeating pattern, as they are in ordinary crystals. Yet they form intricate patterns that are technologically useful.

A computer simulation performed by University of Michigan scientists has given new insights into how this unique class of solids forms. Quasicrystals incorporate clusters of atoms as they are, without rearranging them as regular crystals do, said Sharon Glotzer, a professor in the Department of Chemical Engineering.

Scientists studying images from The High Resolution Imaging Experiment camera on NASA's Mars Reconnaissance Orbiter have discovered never-before-seen impact "megabreccia" and a possibly once-habitable ancient lake on Mars at a place called Holden crater.

The megabreccia is topped by layers of fine sediments that formed in what apparently was a long-lived, calm lake that filled Holden crater on early Mars, HiRISE scientists say.

"Holden crater has some of the best-exposed lake deposits and ancient megabreccia known on Mars," said HiRISE's principal investigator, professor Alfred McEwen of the University of Arizona's Lunar and Planetary Laboratory. "Both contain minerals that formed in the presence of water and mark potentially habitable environments.

SAO PAULO, Brazil, March 6 /PRNewswire/ --

- Increase in installed capacity resulted in growth of 62.1% in generation EBITDA, which reached R$ 442.0 million

EDP - ENERGIAS DO BRASIL S.A. ("Energias do Brasil" or "Group") (Bovespa: ENBR3), a holding company in the electric utilities sector trading on Bovespa's Novo Mercado, today announces its results for the fiscal year 2007. The information is presented on a consolidated basis in accordance with Brazilian Corporate Law and is based on reviewed financial information. The independent auditors did not review the operating information. Amounts are expressed in thousands of Reais, except where otherwise stated.

Scientists have solved a 40-year-old puzzle by identifying the origin of the intense radio waves in the Earth's upper atmosphere that control the dynamics of the Van Allen radiation belts — belts consisting of high-energy electrons that can damage satellites and spacecraft and pose a risk to astronauts performing activities outside their spacecraft.

The source of these low-frequency radio waves, which are known as plasmaspheric hiss, turns out to be not lightning or instabilities from a plasma, as previously proposed, but an intense electromagnetic wave type called "chorus," which energizes electrons and was initially thought to be unrelated to hiss, said Jacob Bortnik, a researcher with the UCLA Department of Atmospheric and Oceanic Sciences.

Plant leaves are photosynthetic organs. Their main job is to harvest energy from sunlight, and use that energy to convert carbon dioxide and water into carbohydrates. In addition to capturing sunlight, leaves need to be good at doing two other things - taking up carbon dioxide and conserving water. These requirements conflict - anything that lets carbon dioxide in also lets water out. To deal with these conflicting requirements, plants produce a waterproof cuticle and regulate carbon dioxide uptake by opening and closing their stomata.

The RoboSwift micro-aircraft has made its first flight. The small, quiet plane is equipped with observation cameras that can be used in the future to study birds or to conduct surveillance of groups of people or vehicles.

The RoboSwift is characterised by the continuously variable shape of its wings, known as ‘morphing' wings, which are modelled on the wings of the swift bird. These wings make the aircraft, like its living model, very maneuverable and efficient. As a result, the RoboSwift is the first aircraft in the world to have the wing properties of living birds. Wind tunnel tests have shown that it can come remarkably close to the exceptional flying ability of the swift.

LONDON, March 5 /PRNewswire/ --

Planalytics Inc., the global leader in Business Weather Intelligence(R), released its February WeatherCall(SM) report today pointing to differences in consumer demand during the month as a result of below normal precipitation. Starting around the 6th of February, many parts of southern England and also the Midlands went between 16 and 18 days without measurable rainfall, which boosted overall high street footfall but hurt sales of specific categories such as rainwear.

A combination of negative mother-daughter relationships and low blood levels of serotonin, an important brain chemical for mood stability, may be lethal for adolescent girls, leaving them vulnerable to engage in self-harming behaviors such as cutting themselves.

New University of Washington research indicates that these two factors in combination account for 64 percent of the difference among adolescents, primarily girls, who engage in self-harming behaviors and those who do not.

“Girls who engage in self harm are at high risk for attempting suicide, and some of them are dying,” said Theodore Beauchaine, a UW associate professor of psychology and co-author of a new study. “There is no better predictor of suicide than previous suicide attempts.”

NEW YORK, March 5 /PRNewswire/ -- What: GoldenSource Corporation, a leading provider of Enterprise Data Management (EDM) solutions, is participating at FIMA 2008 and sponsoring a roundtable as part of the Data Quality & Metrics Day. GoldenSource will host roundtable discussions on the challenges of developing and refining a comprehensive set of data metrics at an enterprise level. Experts will be available at the GoldenSource booth throughout the two day conference to discuss EDM solutions as well as recently announced GoldenSource connections and partnerships.

Where: FIMA 2008, Metropolitan Pavilion, 125 West 18th Street, New York, NY.

When: Data Quality & Metrics Day roundtable: March 11 from 10:40 a.m. to 12:15 p.m.