Live Science: A Big Brother-style network for keeping an eye on the world’s oceans is long overdue, a group of oceanographers says. The world’s oceans have changed dramatically over the past several hundred years. The ocean surface is 30 percent more acidic today than it was in 1800, with much of that increase occurring in the last 50 years — a rising trend that could both harm coral reefs and profoundly impact tiny shelled plankton at the base of the ocean food web, scientists warn. Despite the seriousness…