As many as 90 pilot whales have died after becoming stranded off the southern coast of mainland Australia, local media reported Tuesday.The whales are among 270 that were discovered Monday in shallow waters near Strahan in Macquarie Harbour in the western part of Tasmania, the Tasmanian state government said, adding marine experts and government officials are racing to save the others.In a press statement on the Tasmanian government's website Tuesday, Nic Deka, rescue coordinator and Parks and Wildlife Service regional manager, said rescue crews were already on the scene in Strahan and that…READ FULL ARTICLE