Flash! I just stumbled across an article which had a Northern California brewery making ale with 45 million year old yeast. The taste was apparently unique, not like anything you get in the way of beer or ale today. So I wonder? Did ale in Anglo-Saxon times, taste more like this brew, or was it unique in its own way? Not that they necessarily used 45 million year old yeast; they wouldn't have been able to conceptualize anything that old. But who knows?