Researchers have feared that by the end of this century, the pH of the ocean surface could decrease from 8.2 to 7.8 - i.e. will become more acidic than it has been for the past 20 million years, as researchers estimate. And this eventually...

Human activity, hurricanes and higher water temperatures have catapulted two coral species in Florida and the Caribbean on the federal threatened list. In areas off the Florida Keys and in the Caribbean since 1985, the elkhorn and staghorn...