How many years was the thylacine alive?

The thylacine, also known as the Tasmanian tiger, is believed to have existed for thousands of years, with its ancestors dating back around 4 million years. However, the species itself was declared extinct in the 20th century, with the last known individual dying in captivity in 1936. Therefore, if we consider its existence as a distinct species, it was alive for a significant period, but it is no longer present today.