16-million-year-old fossil of river dolphin found in Peru

Scientists unveiled a 16 million-year-old fossil skull of a river dolphin in Peru, related to the South Asian river dolphin. Named Pebanista yacuruna, it was the largest dolphin in South America, measuring 3-3.5 meters. Ancestors of both dolphins lived in the ocean and freshwater environments. The study was published in Science Advances after the fossil was found in 2018 during a National Geographic-sponsored expedition.