Add Yahoo as a preferred source to see more of our stories on Google. The Great Atlantic Sargassum Belt, a thick mass of leafy, floating seaweed stretching across 5,000 miles of ocean, is forecast to ...

Stinking mats of rotting seaweed are already starting to pile up on beaches across the Caribbean. These mega-blooms of slimy brown algae called sargassum were once seldom seen — but climate change and ...