Capping a week of 100th anniversary celebrations for the National Park Service, President Barack Obama on Friday turned to the ocean to create the largest protected area anywhere on Earth—a half-million-square-mile arc of remote Pacific waters known for both exceptional marine life and importance to native Hawaiian culture.
The Papahānaumokuākea Marine National Monument, established in 2006 by President George W. Bush, already covered 140,000 square miles of ocean around the uninhabited northwestern islands of Hawaii, Obama’s home state. (Learn about the name and how to pronounce it.)
Obama more than quadrupled Papahānaumokuākea’s size, to 582,578 square miles, an area larger than all the national parks combined. Using his executive authority under the U.S. Antiquities Act, he extended most of the
