A continent-long “brown ribbon” has appeared in the Atlantic off Africa — and scientists say it’s not a good sign - Futura-Sciences

Last May, satellites detected 37.5 million tons of pelagic sargassum, a species of brown seaweed, forming an unbroken band from the coast of West Africa to the Gulf of Mexico. This Atlantic Great Sargassum Belt simply did not exist 15 years ago. What was once confined to the Sargasso Sea...