The thylacine once roamed throughout Australia, and on New Guinea, the large island to the north of the continent. It's thought the tiger became extinct on mainland Australia about 2,000 years ago and possibly earlier on New Guinea. A number of theories account for this, including loss of habitat to incoming dingoes, who were far less choosy eaters, and hunting by indigenous peoples. What's far harder to explain away is continued sightings of thylacines on New Guinea. This short video gives a fascinating account of such sightings in West Papua Province (previously known as Irian Jaya). Locals say the thylacine, which they call dobsenga, lives in the region's high country.