Sargassum littered beaches in Fort Lauderdale, Fla., in spring 2023, making a mess during spring break. Joe Raedle/Getty Images

Sargassum, the smelly nemesis of beach vacations, has become a self‑sustaining disaster that will keep coming back

Communities and entrepreneurs are experimenting with ways to turn this nuisance into a valuable resource.
Staghorn coral spawns near North Key Largo, Fla. Liv Williamson/University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science via AP

The world’s fourth mass coral bleaching is underway, but well‑connected reefs may have a better chance to recover

Coral reefs share genetic material across wide areas, with help from ocean currents. This ability is especially important during episodes like the mass bleaching currently occurring.

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