The ocean’s giants are being killed not only by ghost nets but also by invisible microplastics rising through the food chain. Last week, we traced how floating plastic waste is swept into five major oceanic gyres – the North Pacific, South Pacific, North Atlantic, South Atlantic, and Indian Ocean gyres – where it accumulates in vast offshore zones. This week, we turn to the largest and most notorious of them all: the Great Pacific Garbage Patch, located within the North Pacif