If nobody saw one of those in all this years its because dont exist anymore, and i think it was big new for the time, so they really check if was the last tasmanian or not... (It was 😫) Speaking bout other thing... In Argentina they saw an leopardus jacobitus or Andin cat, those animals were not seen since 2008 over there but finally 12 years later they could find one in a protected space in Villaviencio, Mendoza, Argentina. Great news for the cat, bad for the dog...