With 300 birds dead, thousands more in danger, rescuers ask for help
                                
                                
                                    (Newser) -
                                    An isolated island chain halfway between Africa and Argentina, home to 140,000 penguins, is now in the midst of a massive rescue operation, after a  shipwreck sent thousands of gallons of oil and soya bean into the waters there.  More than 300 penguins have already died since the ship...