Ancient Dolphin Fossil Found In New Zealand, 'Papahu Taitapu' Used 'High Frequency Sound' To Navigate [PHOTO]

A dolphin species has been discovered that lived 19 million to 22 million years ago. Researchers from New Zealand's University of Otago uncovered fossils of a skull, jaw, and a few other parts of an ancient dolphin in marine sedimentary rocks in the Cape Farewell region of the country's South Island. Named Papahu taitapu -- after ''Papahu,'' the Maori name for dolphin -- the species is believed to be 6.5 feet long, roughly the size of the modern dolphin.