http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Until recently, researchers studying climate history in Brazil`s dry Nordeste region expected it to have wet and dry periods similar to the rest of South America. But over the past 9,000 years, the region has shown just the opposite, drought when rain was expected, and vice versa. Geoscientists from the University of Massachusetts Amherst and the University of Sao Paolo, Brazil, with others, report this week that they`ve identified the cause as a surprising air circulation pattern. http://www.physorg.com/news154803529.html Space & Earth Wed, 25 Feb 2009 17:00:32 EST news154803529 University of Massachusetts Amherst biologists have discovered a secret of how cells organize chromosomes to prepare for dividing. Their unexpected finding is reported in this week`s issue of the journal, Current Biology. http://www.physorg.com/news152807696.html Biology Mon, 02 Feb 2009 14:35:32 EST news152807696 (PhysOrg.com) -- Bed bugs, once nearly eradicated in the built environment, have made a big comeback recently, especially in urban centers such as New York City. In the first study to explain the failure to control certain bed bug populations, toxicologists at the University of Massachusetts Amherst and Korea`s Seoul National University show that some of these nocturnal blood suckers have developed resistance to pyrethroid insecticides, in particular deltamethrin, that attack their nervous systems. http://www.physorg.com/news150651765.html Biology Thu, 08 Jan 2009 15:42:45 EST news150651765