With aquifers nationwide in dangerous decline, an estimated 500,000 acres of farmland may be taken out of cultivation by 2040 ...

What is H5N9 and how is it different from H5N1? Scientists classify bird flu viruses by which kind of two key proteins are ...

First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment that could trigger human outbreaks.