Science and technology

Associated Press
In this April 28, 2012 photo provided by the Agriculture Ministry, a health ministry worker holds up the carcass of a pelican on the shore of Pimentel beach in Chiclayo, Peru. Scientists studying a mass die-off of dolphins and the more recent deaths of thousands of pelicans on northern Peru's beaches say there is no evidence the two are related. (AP Photo/Agriculture Ministry)

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