Australian Broadcasting Corporation: TONY EASTLEY: Australia’s south-east is still in the grip of drought but scientists believe they might have a better idea of what’s causing the big dry. In recent years, the so-called El Nino effect has figured in the thinking based on rises and falls in sea temperatures in the Pacific Ocean. But new research suggests it might actually be the waters on the other side of Australia that are to blame. Environment reporter Shane McLeod has the story. SHANE MCLEOD: …