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Science News for June 23, 2017


Is it okay for children to count on their fingers?

A recent study published in Frontiers in Education found that using fingers to count and play number games improved math test scores significantly. This challenges traditional teaching methods that discouraged finger use, instead suggesting that finger training could be a valuable tool for teachers.

SourceFrontiers·JournalFrontiers in Education·DateJun 23, 2017

Following a friend leads to unsafe driving behavior

A new study published in Frontiers in Psychology found that drivers who follow another car to a destination are more likely to drive dangerously. They drove faster, made more erratic turns, and followed closer to the car in front. The researchers recommend using a map or navigation device to avoid this behavior.

SourceFrontiers·JournalFrontiers in Psychology·DateJun 23, 2017

Does the emperor have clothes?

Despite being hailed as the key regulator of leanness, leptin's function in humans remains uncharacterized. Researchers call for experimental evidence to demonstrate its mechanism of action, highlighting a crucial gap in our understanding of metabolism and obesity.

SourceHarvard Medical School·JournalCell Metabolism·DateJun 23, 2017

More democracy through mathematics

Researchers at TUM have developed a mathematical method to calculate optimally sized voting districts, reducing the need for controversial redistricting processes. The methodology achieves optimal solutions with deviations below 15% from the average size of electoral districts, making it applicable to many countries.

SourceTechnical University of Munich (TUM)·JournalEuropean Journal of Operational Research·DateJun 23, 2017

Chatter in the deep brain spurs empathy in rats

A study by neuroscientists at Duke and Stanford University found that multiple brain regions collaborate to produce empathetic decision-making in rats. The results clarify conflicting findings on the role of specific brain regions in guiding antisocial behavior, suggesting a more complex neural context.

SourceDuke University·JournalBrain and Behavior·DateJun 23, 2017

Bird's eye perspective

Harvard Medical School researchers studied chicken embryos to understand the formation of high-acuity spot in the retina, which enables crisp daytime vision. They found that suppression of retinoic acid plays a crucial role in this process.

SourceHarvard Medical School·JournalDevelopmental Cell·DateJun 23, 2017

Putting others first can cost lives in emergencies

A new study from the University of Waterloo found that strong individuals should prioritize their own safety before attempting to help weaker people in emergency situations. The research used computer modeling to simulate a flooded subway station, finding that overall survival rates were higher when strong members reached safety first.

SourceUniversity of Waterloo·JournalExpert Systems with Applications·DateJun 23, 2017

Dune ecosystem modelling

Researchers developed a concept to model the physical surroundings' influence on Acacia longifolia's interaction with other plants, considering factors like soil type, nutrients, light intensity, wind, and soil moisture. Isoscapes reveal the distribution of nitrogen introduced by the invasive species across the landscape.

SourceUniversity of Freiburg·JournalScientific Reports·DateJun 23, 2017

Neutron-rich nucleus shapeshifts between a rugby ball and a discus

Researchers have discovered two competing quantum shapes in a neutron-rich krypton isotope, 98Kr, which exhibits a gentle onset of deformation with added neutrons. This finding challenges current understanding of nuclear shapes and provides insight into the limits of quantum phase transition regions.

SourceRIKEN·JournalPhysical Review Letters·DateJun 23, 2017

Equipping form with function

Researchers at IST Austria developed an interactive design tool that allows users to easily adjust a mechanical template to fit their desired shape. This tool guarantees functionality while enabling artists to make aesthetic adjustments, making it possible for novice users to create functional models with ease.

SourceInstitute of Science and Technology Austria·JournalACM Transactions on Graphics·DateJun 23, 2017

Self-folding origami

Researchers use simple chemical 'programming' to induce Nafion foil to fold itself into complex three-dimensional structures, which can be repeatedly 'erased' and reprogrammed. The resulting master molds allow for efficient casting of components with reduced waste.

SourceWiley·JournalAngewandte Chemie International Edition·DateJun 23, 2017

Genes, ozone, and autism

A new analysis shows that genetic variation and elevated ozone exposure increase the risk of developing autism, with an added effect when combined. The study found that copy-number variation and particulate matter in the environment had significant individual impacts on autism risk.

SourcePenn State·JournalAutism Research·DateJun 23, 2017