Two tiger-lion cubs are seen in the tropical wildlife park in Haikou, capital of China's southernmost Province of Hainan, Feb. 9, 2010. The twins now have survived for 162 days since they were born last Sep. 1. Only one out of 500,000 lion-tiger or tiger-lion cubs could survive and have a relatively short life expectancy, due to differences in their chromosomes. [Xinhua]