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Domain: pnas.org
Stories and comments across the archive that link to pnas.org.
Stories · 206
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Workweek Causes Climate Changes
Shipud writes "An article in the Proceedings of the National Academy of Sciences reports that daily temperature ranges are smaller on weekdays than on weekends. This phenomenon is strongest in the US, but also appears in China and Japan. The researchers attribute this to human activity, although the exact mechanism is unclear. The prime suspect is aerosol / cloud interactions. Here is the more legible version from Scientific American" -
Workweek Causes Climate Changes
Shipud writes "An article in the Proceedings of the National Academy of Sciences reports that daily temperature ranges are smaller on weekdays than on weekends. This phenomenon is strongest in the US, but also appears in China and Japan. The researchers attribute this to human activity, although the exact mechanism is unclear. The prime suspect is aerosol / cloud interactions. Here is the more legible version from Scientific American" -
Caltech Researchers Find Longevity-Linked Mutation
CBNobi writes "A study headed by researchers at CalTech have found a genetic mutation occuring in mitochondrial DNA that may signify longevity. The researchers found that the particular mutation occurred in 17% of centenarians, but only 3.7% of younger individuals. They also found the mutations in identical twins, which is a possible sign of inheritance. Researchers believe the mutation controls factors in DNA replication. The report information is available in a press release by CalTech, and the research abstract is also available." -
3D Microfluid Computers Used To Solve NP Problems
Sergio Lucero writes "The Proceedings of the National Academy of Science (PNAS) just published an article on the use of 3D microfluid networks as computers for the solution of very hard (NP) mathematical problems. So far it looks like they've solved a specific case of the maximum clique problem, but of course this also means they can do other stuff." -
Use All Your Brain, Not Only Neurons?
SEWilco writes: "Iowa State researchers found evidence that glial cells communicate in the brain. Previously it was thought that the neurons were active, but glial cells were only structural and nourishment objects. Apparently glial cells can influence neighboring neurons at least through glutamate signals. Details in the Proceedings of the National Academy of Sciences. Maybe we still have a little more to learn about biology." I know, it's my second 'science question' headline of the day, but heck, most science headlines should end with a question mark. -
Scientists map schematic of brain's fibers
jake_the_blue_spruce writes "A simplified press release here and an abstract of the actual paper here details a Washington University study where they used MRI to track nerve fiber bundles from different identified areas of the brain. They made a 3D map of the resulting schematic. It's a lot like the bus-level view of a computer, with the various known brain areas as black boxes connected by fiber bundles. Cool. "Downside is that you have to request an image of it from the article. But I still think my brain looks like my Trash-80.