'Arctic orcas highly contaminated
By Paddy Clark
BBC News
Killer whales have become the most contaminated mammals in the Arctic, new research indicates.
Norwegian scientists have found that killer whales - or orcas, as they are sometimes known - have overtaken polar bears at the head of the toxic table.'
http://news.bbc.co.uk/1/hi/sci/tech/4520104.stm
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