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Science News for April 29, 2016


Scientists discover oral sexual encounters in spiders

Researchers found that male Darwin's bark spiders salivate onto female genitalia as an obligatory behavior before and after copulation. This unusual practice is thought to boost the male's chances of paternity by signaling quality or favoring one sperm over rivals.

SourceZRC SAZU·JournalScientific Reports·DateApr 29, 2016

Screening method uncovers drugs that may combat deadly antibiotic-resistant bacteria

Researchers at Beth Israel Deaconess Medical Center have developed a method to identify new antimicrobials that target antibiotic-resistant bacteria. Approximately 10,000 compounds were screened, and three approved drugs showed promise in inhibiting the growth of carbapenem-resistant Enterobacteriaceae (CRE).

SourceBeth Israel Deaconess Medical Center·JournalAssay and Drug Development Technologies·DateApr 29, 2016

Trauma in a bee

Entomologists have described a traumatic insemination process in which male twisted-winged parasites inject semen directly into the female's body cavity. The fertilization process is unusually prolonged, lasting up to 30 minutes, and is likely used to reduce sperm competition.

SourceFriedrich-Schiller-Universitaet Jena·JournalScientific Reports·DateApr 29, 2016

Don't retweet if you want to remember

Experiments at Cornell University and Beijing University found that retweeting creates cognitive overload, leading to poor comprehension and recall of information. The study suggests that web interfaces should be designed to promote rather than interfere with cognitive processing.

SourceCornell University·JournalComputers in Human Behavior·DateApr 29, 2016

Ebola virus genome provides clues to repeated disease 'flare-ups' in Western Africa

Genomic analysis of Ebola virus samples from Liberia in June 2015 indicates a re-emergence of a persistently infected source, highlighting the risk of disease flare-ups even after an outbreak is declared over. The study's findings suggest that the virus replicates at a lower rate during persistent infections.

Light-powered 3-D printer creates terahertz lens

The new lens uses metamaterials and 3D printing to counter the intrinsic imperfections of typical lenses, enabling flawless images without additional corrective components. The technology has potential applications in biomedical research and security imaging, making terahertz imaging cheaper, higher resolution, and more available.

SourceNorthwestern University·JournalAdvanced Optical Materials·DateApr 29, 2016

What lies beneath West Antarctica?

Scientists have uncovered a wetland-like environment beneath the West Antarctic Ice Sheet, where Subglacial Lake Whillans is fed by melting ice and small amounts of seawater. The findings provide unique insights into the biogeochemistry and geophysics of subglacial lake systems, which are essential for understanding global sea-level rise.

SourceU.S. National Science Foundation·JournalGeophysical Research Letters·DateApr 29, 2016

Save urban bees

A new project aims to mobilize the public to help local urban bees by planting bee-friendly flowers and tracking their movements. The London Pollinator Project encourages Londoners to plant flowers that are rich in nectar and pollen, such as English lavender and spiked speedwell, to support the ailing urban bee population.

Salt-inducible kinases may have therapeutic potential for autoimmune diseases

Research suggests that salt-inducible kinases may have therapeutic potential for autoimmune diseases. By inhibiting these enzymes, scientists were able to limit the production of inflammatory molecules by certain types of human immune cells, increasing levels of anti-inflammatory IL-10 and reducing proinflammatory cytokines.

SourceFederation of American Societies for Experimental Biology·JournalJournal of Leukocyte Biology·DateApr 29, 2016