REHOBOTH BEACH, DELAWARE—Residues of pottery sherds from ancient Scandinavian settlements dating as far back as 1200 B.C. are the inspiration for Delaware-based brewey Dogfish Head's latest ancient ale, Kvasir. Patrick McGovern, a bioarchaeolgist at the University of Pennsylvania Museum and frequent collaborator with Dogfish Head on these brews calls the drink a Nordic grog. The recipe for Kvasir, which is available in limited quantities now, involves yarrow, lingonberries, cranberries, bog myrtle, and birch syrup. Prior to Kvasir, Dogfish Head brewed Midas Touch, influenced by residues taken from 2,700-year-old pottery found in Turkey, and Chateau Jiahu, an ale that traces its history back to Neolithic China.