16-Million-Year-Old Skull of Extinct Species of Giant Dolphin Discovered in Peru
About 16 million years ago, the Peruvian Amazon rainforest was covered by a massive lake known as Pebas, one of the most biodiverse ecosystems to ever exist on Earth. Among the species that called it home was the largest freshwater dolphin ever—a creature whose existence remained in the dark until 2018, when paleontologist Aldo Benites-Palomino spotted a fossilized jaw bone during a field expedition around Peru's Napo River.