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Science News Archive 2009 - Page 198


Page 198 of 277

Fossils suggest earlier land-water transition of tetrapod

A recent study published in Science found that Ichthyostega, a four-limbed animal with backbones, may have been the more primitive form, acquired terrestrial habits later in development. In contrast, Acanthostega's limbs showed more similarities to earlier fish fins, indicating it may have returned to an aquatic lifestyle.

SourceDuke University·JournalScience·DateApr 17, 2009

NC State study finds better way to protect streams from construction runoff

Researchers at NC State University have found an exponentially better way to protect streams and lakes from the muddy runoff associated with stormwater around road and other construction projects. The alternative method uses natural fiber check dams enhanced with polyacrylamide, significantly reducing sediment loss and pollution.

SourceNorth Carolina State University·JournalJournal of Soil and Water Conservation·DateApr 17, 2009

Mystery shoppers cut underage smoking

Research by the University of Massachusetts Medical School found a 20.8% reduction in daily smoking among 10th graders after enforcement of the Synar Amendment. This law makes it financially dangerous for shops to sell tobacco to underage customers, reducing cigarette supply to vulnerable groups.

SourceBMC (BioMed Central)·JournalBMC Public Health·DateApr 16, 2009

Cosmic heavyweights in free-for-all

Astronomers have identified a triple merger of four separate galaxy clusters, the first time such a phenomenon has been documented. The galaxy clusters are involved in a cosmic free-for-all, with one collision after another occurring as galaxies pour into a region already full of galaxies.

SourceChandra X-ray Center·JournalThe Astrophysical Journal Letters·DateApr 16, 2009

Singapore scientists synthesize gold to shed light on cells' inner workings

Researchers at the Institute of Bioengineering and Nanotechnology have synthesized gold nanoclusters that can be used for sub-cellular biolabeling and bioimaging. These clusters are suitable for use within the body due to their lack of toxic metals, enabling scientists to monitor cell nucleus dynamics and study genomic changes.

SourceAgency for Science, Technology and Research (A*STAR), Singapore·JournalJournal of the American Chemical Society·DateApr 16, 2009