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Science News for April 19, 2019


Collecting the right quantity of evidence: How the brain makes a difficult decision

Two studies investigate perceptual decision making in rats and humans, showing that the brain compares incoming sensory evidence to express a decision as soon as it reaches a fixed boundary. The findings support the 'bounded integration' model, which explains how the nervous system accumulates information over time.

Study finds that quitting smoking during pregnancy lowers risk of preterm births

A Dartmouth-led study published in JAMA Network Open found that quitting smoking during pregnancy reduces the risk of preterm birth. The probability of preterm birth decreased by up to 20% if cessation occurred at the beginning of pregnancy. However, only about 25% of women who smoked prior to pregnancy were able to quit throughout the...

SourceThe Geisel School of Medicine at Dartmouth·JournalJAMA Network Open·DateApr 19, 2019

Weapons trade reveals a darker side to dark web

Research published in Deviant Behavior found that the dark web is a hub for anonymous handgun sales, with 64% of products advertised being handguns. The study sheds light on a niche market where buyers can circumvent stricter gun laws, highlighting the need for further investigations and potential regulation.

SourceMichigan State University·JournalDeviant Behavior·DateApr 19, 2019

Plants are also stressed out

Researchers discover GUN1 plays a crucial role in regulating chloroplast-to-nucleus communication, enabling plants to respond to stress. This finding may help breed plants that can better withstand environmental stressors and maintain food production.

SourceSalk Institute·JournalProceedings of the National Academy of Sciences·DateApr 19, 2019