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Science News for January 9, 2007


A star's death comes to light

A team of astronomers has solved the long-standing mystery of Kepler's supernova remnant using Chandra's latest image, revealing it as a Type Ia supernova. The discovery sheds light on how stars can end catastrophically and expands our understanding of the universe.

Big-brained birds survive better in nature

A new study reveals that birds with larger brains relative to their body size have a lower mortality rate than those with smaller brains. The research supports the cognitive buffer hypothesis, which suggests that large brains enable animals to better cope with environmental challenges such as climate change and habitat destruction.

Spanish scientists reveal dynamic map of proteins

Scientists from IRB Barcelona have published a dynamic map of protein behavior, enabling the prediction of protein structures and interactions. The study, part of the MoDel project, aims to establish a 'fourth dimension' for protein structures, facilitating the design of new drugs and understanding of protein functions.

SourceInstitute for Research in Biomedicine (IRB Barcelona)·JournalProceedings of the National Academy of Sciences·DateJan 9, 2007

Benefits of testosterone treatment unknown, research shows

Two Mayo Clinic studies found no strong evidence supporting testosterone's safety from cardiovascular harm and inconsistent results regarding its impact on sexual dysfunction. The research highlights the need for large-scale trials to inform clinicians' decisions about prescribing testosterone.

SourceMayo Clinic·JournalMayo Clinic Proceedings·DateJan 9, 2007

NSF funds biofertilizer research at Rutgers-Camden

A Rutgers-Camden research team, led by Heike Bücking, aims to develop a better understanding of the nutrient exchange processes between fungi and agricultural environments. The project seeks to promote the use of mycorrhizal fungi as biofertilizers to reduce fertilizer pollution and improve agricultural sustainability.

New study sheds light on 'dark states' in DNA

Researchers at Ohio State University have discovered a new high-energy state in DNA that helps dissipate UV energy. The 'dark state', which can last for 10-150 picoseconds, is found in single nucleotides and dissolves energy through 10-50% of the time. This discovery may provide insights into DNA damage and repair mechanisms.

SourceOhio State University·JournalProceedings of the National Academy of Sciences·DateJan 9, 2007

UCR researchers examine how some invasive plants gain a foothold

Researchers found that controlling sexual compatibility in self-incompatible plants like the California wild radish can help minimize their reproductive success and prevent establishment. Larger population sizes and genetic diversity also boosted reproduction, highlighting potential strategies to combat invasive plant spread.

SourceUniversity of California - Riverside·JournalProceedings of the National Academy of Sciences·DateJan 9, 2007