Two studies shed new light on mercury pollution in the waters of the northeastern United States. Mercury, which is transformed into methylmercury in water, is a global pollutant that damages human health. Most people are exposed to mercury by eating fish, particularly from open ocean and coastal fisheries. All 50 states have had fish consumption advisories pertaining to mercury. Estuaries act as a repository for methylmercury, storing toxic particulates in both the sediment and water column....