Submersible disasters are extremely rare—and vessels are built to last. Girguis cites the Alvin: Commissioned in 1964, the deep-ocean research submersible was the first crewed vessel to explore the Titanic wreckage, in 1986. It’s still in operation, having made more ...

Some reports have also sparked fears of “flesh-eating bacteria” among the algae, but there is no evidence for this. When people come into close contact with rotting sargassum, they can experience health problems, including diarrhea, vomiting, and eye irritation, so ...