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Science News Archive May 2013 - Page 13


Page 13 of 30

Fossil brain teaser

Researchers studied 150-million-year-old dinosaur fossils to reconstruct their brain and inner ear anatomy. The study found that the brain underwent significant changes during growth, with important parts for hearing and cognitive processes already well-developed in young dinosaurs.

SourceUniversity of Bristol·JournalJournal of Evolutionary Biology·DateMay 20, 2013

Slow earthquakes: It's all in the rock mechanics

A team of seismologists has discovered that slow earthquakes, which last minutes rather than seconds, are linked to the type of rock in faults. Laboratory experiments using natural samples from Japan found that clay minerals play a key role in this slip behavior, influencing how rocks react to shear.

SourcePenn State·JournalNature Geoscience·DateMay 20, 2013

Principles of locomotion in confined spaces could help robot teams work underground

Researchers studied fire ants' tunnel networks to discover fundamental principles of locomotion that can be applied to robot teams working underground. The study found that ants use their antennae for both sensing and movement in confined spaces, allowing them to move quickly and easily through tunnels.

SourceGeorgia Institute of Technology·JournalProceedings of the National Academy of Sciences·DateMay 20, 2013

Practice makes perfect? Not so much

A study by Michigan State University's Zach Hambrick found that practice accounts for only about one-third of the differences in skill in chess and music. Natural talent and factors such as intelligence and age of start may contribute to the remaining two-thirds.

SourceMichigan State University·JournalIntelligence·DateMay 20, 2013

The compound in the Mediterranean diet that makes cancer cells 'mortal'

A compound found in plant-based foods like parsley and celery has been shown to re-educate cancer cells into normal cells, making them more susceptible to death. The study, led by Ohio State University researchers, suggests that apigenin can restore normal gene regulation, leading to increased cell death rates among breast cancer cells.

SourceOhio State University·JournalProceedings of the National Academy of Sciences·DateMay 20, 2013

Atherosclerotic disease heredity mapped in nationwide study

A nationwide study reveals that heredity plays a significant role in common forms of atherosclerotic disease, with risk highest for individuals with family history. The study found a strong correlation between early-onset aortic atherosclerosis and increased risk of developing the same type of disease.

SourceLund University·JournalInternational Journal of Cardiology·DateMay 20, 2013

May research highlights from American Journal of Tropical Medicine and Hygiene

Researchers have developed a new rapid diagnostic test for worm infections that provides substantial improvement over the current standard. The test is expected to be more sensitive and easier to use than existing methods, and will help guide public health efforts to eliminate lymphatic filariasis. Lymphatic filariasis affects approxim...

SourceBurness·JournalAmerican Journal of Tropical Medicine and Hygiene·DateMay 20, 2013

Whole-cell vaccine was more effective than acellular vaccine during California pertussis outbreak

A new Kaiser Permanente study published in Pediatrics found that whole-cell pertussis vaccines were more effective at protecting against pertussis than acellular pertussis vaccines during a large recent outbreak in California. The study examined 138 individuals with confirmed pertussis and found that teenagers vaccinated with four dose...

SourceKaiser Permanente·JournalPEDIATRICS·DateMay 20, 2013

IMRT may not be more effective than older radiation techniques after prostatectomy

A recent study published in JAMA Internal Medicine found that intensity-modulated radiation therapy (IMRT) may not be more effective than conformal radiation therapy (CRT) after prostatectomy. The study compared outcomes of 457 IMRT and 557 CRT patients treated between 2002 and 2007, showing no significant difference in long-term side ...

SourceUniversity of North Carolina Health Care·JournalJAMA Internal Medicine·DateMay 20, 2013

Kinks and curves at the nanoscale

New research finds that coherent twin boundaries in metals contain tiny kink-like steps and curvatures, making them stronger but also more electrically resistant. This discovery challenges previous understanding of these materials and could lead to improved engineering designs for high-strength applications.

SourceUniversity of Vermont·JournalNature Materials·DateMay 19, 2013

Why we need to put the fish back into fisheries

A recent study found that traditional fisheries targeting large predators like cod have declined, while shellfish such as prawns and scallops have increased in value. However, this shift is at risk due to disease, species invasions, and climate change, which threaten the long-term sustainability of these ecosystems.

SourceUniversity of York·JournalFish and Fisheries·DateMay 19, 2013

Competition in the quantum world

Researchers at the University of Innsbruck and Complutense University of Madrid use a quantum simulator to study quantum mechanical phase transitions in many-body systems. They observe how competition between two processes takes place, leading to fragile long-range correlations between distant particles.

SourceUniversity of Innsbruck·JournalNature Physics·DateMay 19, 2013

Lovelorn frogs bag closest crooner

In a surprise twist, female strawberry poison frogs in Costa Rica prioritize the nearest singing male over physical appearance and vocal quality. The research found that females fail to discriminate between different call rates or frequencies, instead opting for the closest speaker.

SourceBMC (BioMed Central)·JournalFrontiers in Zoology·DateMay 19, 2013

Ketamine shows significant therapeutic benefit in people with treatment-resistant depression

Researchers found ketamine to be effective in treating treatment-resistant depression within 24 hours, with a response rate of 63.8% compared to 28% in the placebo group. The antidepressant benefits were durable after seven days, making ketamine a promising new treatment option for patients with severe and refractory forms of depression.

For combat veterans suffering from post-traumatic stress disorder, 'fear circuitry' in the brain never rests

Researchers at NYU Langone Health found that combat veterans with PTSD exhibit abnormal brain activity in key fear and anxiety regions even at rest. The study sheds light on which areas of the brain provoke traumatic symptoms and represents a critical step toward better diagnostics and treatments for PTSD.