Archive: 18/04/2011

Pacific salmon may be dying from leukemia-type virus

In Canada's Fraser River, a mysterious illness has killed millions of Pacific salmon, and scientists have a new hypothesis about why: The wild salmon are suffering from viral infections similar to those linked to some forms ...

dateApr 18, 2011 in Ecology
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Rings reveal extensive yearly climate record

A new study of the oldest trees in Mexico provides the first ever detailed, year-by-year look at the climate of Mesoamerica over a thousand-year span. The data, gathered from the annual growth rings in trees, supplies precise ...

dateApr 18, 2011 in Earth Sciences
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