Science Times: Increasing acidity of the ocean is dissolving the shells of tiny marine snails called pteropods, according to a new study by the National Oceanic and Atmospheric Administration. The pteropod is a free-swimming snail found in oceans around the world that grows to a size of about one-eighth to one-half inch. The evidence of corrosive waters impacting the snails, which provide food for pink salmon, mackerel, and herring, was discovered by a research team at NOAA's Pacific Marine Environmental Laboratory...