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A Tasmanian tiger, or thylacine (Thylacinus cynocephalus) in captivity, circa 1930. The species is believed to have become extinct in the early 20th Century. (Photo by Popperfoto/Getty Images)

A Tasmanian tiger, or thylacine (Thylacinus cynocephalus) in captivity, circa 1930. The species is believed to have become extinct in the early 20th Century. (Photo by Popperfoto/Getty Images)