United Press International: The warmer temperatures associated with climate change could speed the spread of the invasive mosquitofish in northern Europe, scientists in Spain said. The mosquitofish, Gambusia holbrooki, is native to the United States and was introduced in Spain in 1921. Since then, it has spread to more than 50 countries on every continent except Antarctica, the Spanish Foundation for Science and Technology Climate Change said in a release Thursday. The freshwater fish thrives in …