Depending on whom you ask, the Tasmanian tiger or thylacine has either been extinct for nearly a century or has been just really good at hiding. Now new research examining hundreds of reports from more than a century shows there is a good chance the thylacine may have persisted for a few decades longer in the most remote parts of Tasmania. “There are pockets where the species could have maintained small populations,” said Barry Brook, a professor of environmental sustainability at the University of Tasmania. One of the problems with the thylacine, and extinction in general, is it’s hard to prove something is truly gone. Australia’s night parrot for instance, was thought to be extinct for 140 years until its recent rediscovery.

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