Researchers are designing a global real-time monitoring system to help save the world's coral reefs from further decline, primarily due to bleaching caused by global warming.

Time-lapse video shows how a mushroom coral polyp pulses and inflates, flinging its soft body into micro-hops to slowly move itself to a new location.

The SS United States, one of the nation's most storied ocean liners which has sat in retirement in Philadelphia for nearly 30 ...