Support WBURAfter Maria, One Of The World's Best Bioluminescent Bays Slowly Begins To Glow AgainPlay03:06Download AudioMerrit KennedyLauren MigakiDecember 27, 2017 ShareTwo people swim at a beach in Vieques, Puerto Rico. One of the bays on the island is famous for its bioluminescent plankton, which are slowly recovering after Hurricane Maria. (Ricardo Arduengo for NPR)