'Survived the test of time': Vegemite spread still popular 100 years on from invention

It's 100 years since Australian chemist Cyril Callister invented Vegemite as an alternative to Marmite, which had become scarce due to German U-boats sinking the ships bringing the English spread. From humble beginnings to annual sales of more than 22 million jars, the yeast-based spread has become a fixture of culture down under. It's now so iconic the City of Melbourne Council has included the smell of the factory at 1 Vegemite Way in a statement of heritage significance. Jamie Callister explores his grandfather Cyril's life and legacy in Vegemite: The True Story of the Man Who Invented an Australian Icon.