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Science News for January 8, 2016


Xistential crisis: Discovery shows there's more to the story in silencing X chromosomes

Scientists discover that Xist RNA is insufficient to silence one of the two X chromosomes in every female cell, suggesting a complex interplay between molecules. This finding could lead to new ways to fight X-linked diseases in females, including those linked to autism, hemophilia, and muscular dystrophy.

SourceMichigan Medicine - University of Michigan·JournalProceedings of the National Academy of Sciences·DateJan 8, 2016

Risk taking across life span: The effects of hardship

Researchers found that risk-taking propensity decreases with age in most countries, but remains high in countries with poverty and inequality. The study, published in Psychological Science, analyzed data from 77 countries and showed a clear connection between country standards of living and citizens' willingness to take risks.

SourceUniversity of Basel·JournalPsychological Science·DateJan 8, 2016

Quiet quasar has apparently eaten its fill

Astronomers discovered a distant quasar that has apparently run out of gas, leading to a significant decrease in its brightness. The quasar, SDSS J1011+5442, was found to have consumed all the glowing-hot gas in its vicinity, causing it to dim drastically.

SourceUniversity of Washington·JournalMonthly Notices of the Royal Astronomical Society·DateJan 8, 2016

New work on knee cartilage structure to aid better replacements and injury treatments

A new study by Penn and Delaware researchers sheds light on the mechanics and biology of natural and engineered tissue, informing ways to treat injuries like knee meniscus tears and age-related tissue degeneration. The team developed micro-engineered models that replicate key features of degenerating native tissue, enabling testing of ...