DNA studies and thorough analysis led scientists to discoveries about how tigers migrated from China to Russia and through Central Asia.
Apparently, Siberian, or Amur, tigers found in the Russian Far East today and visibly isolated from all other tiger populations, are a sub-species that evolved from the now-extinct Caspian tiger from Central Asia. Or at least that the Caspian tiger was the nearest genetic neighbour to the Siberian tiger.
Some may think that it should lead to directions on how to re-populate Central Asia with Siberian tigers from either China or Russia.
Note: The last Caspian tigers have been observed in 1970.
Source: University of Oxford.