The extinction of animals

The extinct animal has been described through a re-examination of a specimen that's been in a museum collection since 1951. | Researchers think it is a relative of the endangered South Asian river dolphin, offering clues to the evolutionary history of modern species. | The findings have been published in the journal open access Peer J. | It then spent decades in the collection of the Smithsonian Museum of Natural History in Washington DC. | The fossil, a partial skull about 22cm (9ins) long, was discovered in southeastern Alaska by geologist Donald J Miller in 1961.