Support WBUROnly 51 of these U.S. whales remain. Little has been done to prevent their extinctionPlay07:01Download AudioChiara EisnerNick McMillanNovember 16, 2023 ShareRice's whales are one of the most recently discovered whale species in the world — and already one of the most endangered. But protections for the Gulf of Mexico species have been repeatedly delayed. (KL Murphy for NPR)