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Science News Archive March 2012 - Page 2


Page 2 of 32

When dinosaurs roamed a fiery landscape

Researchers have found that fire was more widespread than previously thought during the Cretaceous period, potentially altering dinosaur communities. Charcoal deposits in fossil records indicate frequent wildfires, which could have exacerbated erosion and flooding.

SourceField Museum·JournalCretaceous Research·DateMar 29, 2012

Scientists refine Earth's clock

New research from the British Geological Survey and MIT refines the data used to determine how much time has passed since a mineral or rock was formed. The results show that minerals naturally capture uranium when they form, which in turn undergoes radioactive decays to other elements, allowing for more accurate age determinations.

SourceBritish Geological Survey·JournalScience·DateMar 29, 2012

Mites form friendly societies

A new study found that predatory mites who live among familiar neighbors are more efficient at finding food due to reduced stress. This social familiarity allows individuals to focus on other tasks, leading to increased productivity.

Countdown to 2015: Among interventions to promote maternal and newborn health in developing countries, early breast feeding is the most equitable intervention, with skilled birth attendance the least equitable

The study finds that early initiation of breastfeeding is the most equitable intervention among various maternal and newborn health interventions. Community-based interventions were more equally distributed than those delivered in health facilities, suggesting a need for targeted efforts to reach poorest individuals.

SourceThe Lancet_DELETED·JournalThe Lancet·DateMar 29, 2012

Being bilingual wards off symptoms of dementia

Bilingualism has been shown to improve cognitive reserve and sustain better cognitive performance throughout the lifespan, potentially delaying dementia onset. Lifelong experience managing multiple languages reorganizes specific brain networks, creating a more effective basis for executive control.

SourceCell Press·JournalTrends in Cognitive Sciences·DateMar 29, 2012

Elderly thyroid surgery patients at increased risk for postoperative complications

A recent study published in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that elderly thyroid surgery patients are at a higher risk for serious complications. The study examined 7,915 patients from the American College of Surgeons National Surgical Quality Improvement Program database and found that elde...

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateMar 29, 2012

Scientists clone 'survivor' elm trees

Researchers at the University of Guelph have cloned American elm trees that survived Dutch elm disease epidemics, offering a potential model for preserving endangered plant species. The breakthrough could help reintroduce disease-resistant trees and conserve thousands of other endangered species.

SourceUniversity of Guelph·JournalCanadian Journal of Forest Research·DateMar 29, 2012

Microprocessors from pencil lead

Researchers found a way to influence electron flow through graphene by mounting it on boron nitride, enabling more controlled electronic properties. The discovery creates hexagonal structures that prevent some electrons from passing through, opening up new possibilities for graphene-based microelectronics.

SourceUniversity of Arizona·JournalNature Physics·DateMar 29, 2012

Revival of the American elm tree

A study published in Canadian Journal of Forest Research uses shoot buds from a century-old American elm to develop an in vitro conservation system, potentially providing disease resistance for future plantings. The culture system has been used successfully to establish a repository representing 17 mature American elms from Ontario.

SourceCanadian Science Publishing·JournalCanadian Journal of Forest Research·DateMar 29, 2012

'Backpacking' bacteria

Researchers have created 'backpacking' bacteria that can carry micro- or nano-sized molecules or devices with useful properties. These biohybrid devices can move freely while carrying cargo, and the team plans to test their feasibility in laboratory experiments and potentially use them for diagnosing and treating diseases.