[Endangered baby dolphin dies after swimmers pass it around for selfies]"Some of it has been sitting there for decades," Boersma said. On Tuesday, she and Pyenson introduced their latest find to the scientific community: A 25 million-year-old river dolphin they've dubbed Arktocara yakataga. The other species are similar to one another, but more like an oceanic dolphin than like their fellow river-dweller Platanista. The other intriguing thing about Arktocara yakataga is that it was reportedly found up in Alaska, which would mean the dolphin dwelled in the ancient Arctic. "It would be interesting to know what whales started out in the Arctic," Boersma said.

Source: Washington Post August 17, 2016 11:05 UTC