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New work proposes a mechanism by which #highfat (HF) #diets #dampen the #brain's #reward system. #Mice on HF diets produce less of a "fullness" signaling molecule called #OEA and show a smaller reward system response (#dopamine) to high #calorie foods than those on #lowfat (LF) diets (A, B; black traces). This work shows the two are linked: administering OEA to HF mice restores their high calorie food response to LF mice-like levels. #science #neuroscience #diet #sciencemagazine http://www.sciencemag.org/content/341/6147/800

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Though often cited as #canonical examples of #colorblindness, this work shows #dogs make better use of #color than #brightness information (in this particular task). #science #neuroscience #animalbehavior #rspb http://rspb.royalsocietypublishing.org/content/280/1766/20131356

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It appears that #brain #circuits for #action #selection based on #visual stimulus #value are segregated: those concerned with #stable values are separated from those dealing with #variable values (in the #caudate). That such a segregation exists shows how fundamental these two classes of valuation (stable vs flexible) must be to the brain. #science #neuroscience #reward #cell #neuron http://www.cell.com/neuron/abstract/S0896-6273(13)00560-6

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New #genetic data seems to place #ychromosome #adam closer in time and space to #mitochondrial #eve than was previously thought. These data suggest that the #male #progenitor if the #human #species lived in #africa between 120-200k years ago. #science #genetics; #sciencemagazine via #nytimes http://www.sciencemag.org/content/341/6145/562

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Watching #ads for #claritin make it more effective, at least if you believe the ads. This study found that non-allergy sufferers who watch a movie interspersed with Claritin ads showed a greater physiological response to the drug than did those who viewed #zyrtec ads; the authors note that the change was "broadly consistent" with changes in belief regarding the efficacy of the drugs after ad viewing. #science #placebo #pnas http://www.pnas.org/content/110/32/12931

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Eating #chocolate makes #nobelprize winners. This study shows a by country #correlation between chocolate consumed per-year per-capita and the number of Nobel prize winners per 10 million residents. #science #medicine #nejm via #nature http://www.nejm.org/doi/full/10.1056/NEJMon1211064

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#Archaeologists studying the #Khmer Empire at #Angkor, in northwest #Cambodia were partially stymied by "the dense forest [that] obscures the traces of the civilization that typically remain in evidence in surface topography". But by using "airborne laser scanning (#lidar) technology to create high-precision digital elevation models of the ground surface beneath the vegetation cover" this work was able to "identify an entire, previously undocumented, formally planned #urban landscape into which the major temples such as Angkor Wat were integrated." #science #pnas http://www.pnas.org/content/110/31/12595.short

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It appears that certain #seabirds use #smell to #navigate. Temporarily #anosmic seabirds (deprived of the sense of smell) released at random away from home end up farther away after 5 days than unmanipulated controls or those prevented from using #magnetic navigation signals. #science #animalbehavior. #jeb via #nature http://jeb.biologists.org/content/216/15/2798