For this argument to end (finally) it will take a Landmark Event. Melting glaciers aren't dramatic enough to convince those who've bought into the "Natural Course of Events" school of thought. For years I've said it would be the sight of thousands of dead penguins. Picture that. Thousands of penguin carcasses on the 6:00 News. Water temp rises, Krill dies off. Fish die off. Penguins starve, face extinction. Massive Human effort to round up the remaining few to preserve in captivity. "Hey, maybe those Scaremongers were onto something".