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Science News Archive February 2012 - Page 24


Page 24 of 30

Not the black sheep of domestic animals

A study mapping sheep ancestry over 11,000 years reveals vast genetic diversity and adaptability to diverse environments. The research provides insights into the evolution of selective breeding for traits such as coat color and body size.

SourcePLOS·JournalPLOS Biology·DateFeb 7, 2012

Comparing yourself to others can have health impacts

Researchers found that comparing downward to others who are worse off can lead to immediate positive feelings, while upward comparisons may improve physical health measures and hope for improvement. However, the effects can be negative in both cases, highlighting the need for better understanding of social comparison dynamics.

SourcePenn State·JournalHealth Psychology Review·DateFeb 7, 2012

A therapist in your pocket

Researchers at Northwestern University are developing novel technologies to treat depression and other mood disorders using smartphones, web-based platforms, and virtual human coaches. These innovative approaches aim to provide immediate support, increase accessibility, and reduce costs.

New insights into how to correct false knowledge

Researchers at Duke University found that correcting false knowledge requires providing students with feedback, which enables them to identify errors and learn correct information. Students who received feedback were more likely to correct their mistakes in the short-term, but also more likely to forget the correct answer if they didn'...

SourceDuke University·JournalPsychonomic Bulletin & Review·DateFeb 7, 2012

Teenage pregnancy is not a racial issue

Researchers Lorette I. Winters and Paul C. Winters found that while black teens are twice as likely to be pregnant, rates for minor whites have increased and surpassed those of poor black minors. In better economies, the difference between black and white teen pregnancies nearly disappears.

SourceSAGE·JournalSAGE Open·DateFeb 7, 2012

Warning! Collision imminent!

Researchers at McGill University discovered how the brain processes visual information to detect motion and collisions. Using mathematical models and recording techniques, they found that specific neurons in the brain's visual cortex respond selectively to motion patterns.

SourceMcGill University·JournalProceedings of the National Academy of Sciences·DateFeb 7, 2012

Innovation promises expanded roles for microsensors

The new approach allows for reliable sensing with compact devices, opening up potential applications in national security, food processing, breath analyzers, industrial monitoring, and more. Researchers have improved the performance of microsensors using tiny vibrating microcantilevers to detect chemical and biological agents.

SourcePurdue University·JournalJournal of Microelectromechanical Systems·DateFeb 7, 2012

Working memory and the brain

Researchers found that visual working memory follows a more general pattern of brain activity than previously thought, activating a wider area in the front of the brain for all types of visual stimuli. This study provides support for current models of memory as being located in distributed networks rather than specific brain modules.

SourceAmerican Physiological Society·JournalJournal of Neurophysiology·DateFeb 6, 2012

Fossil cricket reveals Jurassic love song

A fossilized bushcricket from the Jurassic period has revealed a new species' musical call, shedding light on the acoustic environment and potential auditory capacity of other animals. The song was reconstructed using biomechanical principles and is believed to have been used for long-distance communication.

SourceUniversity of Bristol·JournalProceedings of the National Academy of Sciences·DateFeb 6, 2012

JCI online early table of contents: Feb. 6, 2012

Research by Sheila Collins and colleagues found that cardiac natriuretic peptides cause white fat cells to take on characteristics of brown fat cells, increasing energy usage. In another study, Anne Müller's team identified a cellular mechanism by which Helicobacter pylori protects against asthma by modulating immune cells.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 6, 2012

Geometry, not gender

A recent study published in the Journal of Bone and Joint Surgery found that women and some men with non-contact ACL injuries share a common geometry on their knee joints, which may explain why women are at greater risk for ACL injuries. The study suggests that this geometry, characterized by a shorter and more rounded tibial plateau, ...

SourceAmerican Academy of Orthopaedic Surgeons·JournalJournal of Bone and Joint Surgery·DateFeb 6, 2012

How autoreactive T cells slip through the cracks

Researchers found that autoreactive T cells from patients with multiple sclerosis and type 1 diabetes bound their targets more weakly than helpful T cells. These autoaggressive T cells may slip through safety screens by failing to notice their targets, suggesting a new mechanism for autoimmune disease progression.

SourceRockefeller University Press·JournalJournal of Experimental Medicine·DateFeb 6, 2012