Seasonal sargassum blooms have exploded in the tropical Atlantic over the past decade and more. This year’s is already staggeringly large. A raft of brown-colored seaweed in the Atlantic Ocean is so vast it can be seen from space. Spanning roughly 5,000 miles — about twice the width of the United States — the … Lire la suite de A giant seaweed bloom that can be seen from space threatens beaches in Florida and Mexico