Independent (UK): The world’s most damaging oil spill — now in its 41st continuously gushing day — is creating huge unseen “dead zones” in the Gulf of Mexico, according to oceanologists and toxicologists. They say that if their fears are correct, then the sea’s entire food chain could suffer years of devastation, with almost no marine life in the region escaping its effects. While the sight of tar balls and oil-covered birds on Louisiana’s shoreline has been the most visible sign of the spill’s …