SINGAPORE:- Inuka, the first polar bear born in the tropics, was put down Wednesday after a rapid decline in health, with Singapore Zoo mourning the loss of one of its best-loved animals. The bear, whose name means “Silent Stalker” in Inuit, had reached the grand old age of 27 - into his 70s in human years and two years older than the average lifespan of the creatures in captivity. Born at the zoo, Inuka was particularly popular with visitors due to his playful antics in his enclosure. But in recent years he had suffered age-related ailments including arthritis, and an examination at the start of this month revealed his health was failing markedly.