BBC NEWS | Science/Nature | Pacific whale decline 'a mystery'Grey whales in the eastern Pacific appear to be in some trouble, with the cause far from clear, scientists say. Researchers with the conservation group Earthwatch found that whales are arriving in their breeding grounds off the Mexican coast malnourished. The same thing happened just after the 1997/8 El Nino event, which warmed the waters and depleted food stocks. Scientists are not sure whether t
