Two Bengal tiger cubs breastfed for weeks by a Rangoon housewife have died of heat and dehydration, a Burma newspaper reported today. The black-striped, orange-brown cubs drew worldwide attention when Hla Htay, a mother of a baby boy, answered a plea for help from Rangoon's zoo and fed the cats three times a day after they were rejected by their tigress mother. But the cubs -- a male and female born on March 17 -- did not take well to human milk and they grew weaker as temperatures soared in the hot season. The male died on May 3, six...