Malley conducted what is regarded as the most intensive search ever carried out, including exhaustive surveys along Tasmania's west coast, installation of automatic camera stations, prompt investigations of claimed sightings, and in 1972 the creation of the Thylacine Expeditionary Research Team with Dr. Bob Brown, which concluded without finding any evidence of the thylacine's existence. The Department of Conservation and Land Management recorded 203 reports of sightings of the thylacine in Western Australia from 1936 to 1998. On the mainland, sightings are most frequently reported in Southern Victoria. According to the Department of Primary Industries, Parks, Water and Environment, there have been eight unconfirmed thylacine sighting reports between 2016 and 2019, with the latest unconfirmed visual sighting on 25 February 2018. Since the disappearance and effective extinction of the thylacine, speculation and searches for a living specimen have become a topic of interest to some members of the cryptozoology subculture. The search for the animal has been the subject of books and articles, with many reported sightings that are largely regarded as dubious. A preliminary 2021 study published by Brook et al.. compiles many of the alleged sightings of thylacines in Tasmania throughout the 20th century and claims that contrary to beliefs that thylacines went extinct in the 1930s, the Tasmanian thylacine may have actually lasted throughout the 20th century with a window of extinction between the 1980s and the present day, with the likely extinction date being between the late 1990s and early 2000s. In 1983, the American media mogul Ted Turner offered a $100,000 reward for proof of the continued existence of the thylacine. In March 2005, Australian news magazine The Bulletin, as part of its 125th anniversary celebrations, offered a $1.25 million reward for the safe capture of a live thylacine. When the offer closed at the end of June 2005, no one had produced any evidence of the animal's existence. An offer of $1.75 million has subsequently been offered by a Tasmanian tour operator, Stewart Malcolm. Research Research into thylacines relies heavily on specimens held in museums and other institutions across the world. The number and distribution of these specimens has been recorded in the International Thylacine Specimen Database. As of 2022, 756 specimens are held in 115 museums and university collections in 23 countries. In 2017, a reference library of 159 micrographic images of thylacine hair was jointly produced by CSIRO and Where Light Meets