The brewers also went so far as to harvest a local yeast, which might be descended from ancient varieties (many commercial beers are made with manufactured cultures). They left sugar-filled petri dishes out overnight at a remote Egyptian date farm, to capture wild airborne yeast cells, then mailed the samples to a Belgian lab, where the organisms were isolated and grown in large quantities.
Back at Dogfish Head, the tea of ingredients now inexplicably smacks of pineapple. McGovern advises the brewers to use less za’atar; they comply. The spices are dumped into a stainless steel kettle to stew with barley sugars and hops. McGovern acknowledges that the heat source should technically be wood or dried dung, not gas, but he notes approvingly that the kettle’s base is insulated with bricks, a suitably ancient technique.
As the beer boils during lunch break, McGovern sidles up to the brewery’s well-appointed bar and pours a tall, frosty Midas Touch for himself, spurning the Cokes nursed by the other brewers. He’s fond of citing the role of beer in ancient workplaces. “For the pyramids, each worker got a daily ration of four to five liters,” he says loudly, perhaps for Calagione’s benefit. “It was a source of nutrition, refreshment and reward for all the hard work. It was beer for pay. You would have had a rebellion on your hands if they’d run out. The pyramids might not have been built if there hadn’t been enough beer.”
Soon the little brew room is filled with fragrant roiling steam, with hints of toast and molasses—an aroma that can only be described as intoxicating. The wort, or unfermented beer, emerges a pretty palomino color; the brewers add flasks of the yellowish, murky-looking Egyptian yeast and fermentation begins.
They plan on making just seven kegs of the experimental beverage, to be unveiled in New York City two weeks later. The brewers are concerned because the beer will need that much time to age and nobody will be able to taste it in advance.
McGovern, though, is thinking on another time scale entirely. “This probably hasn’t been smelled for 18,000 years,” he sighs, inhaling the delicious air.
The shelves of McGovern’s office in the University of Pennsylvania Museum are packed with sober-sounding volumes—Structural Inorganic Chemistry, Cattle-Keepers of the Eastern Sahara—along with bits of bacchanalia. There are replicas of ancient bronze drinking vessels, stoppered flasks of Chinese rice wine and an old empty Midas Touch bottle with a bit of amber goo in the bottom that might intrigue archaeologists thousands of years hence. There’s also a wreath that his wife, Doris, a retired university administrator, wove from wild Pennsylvania grape vines and the corks of favorite bottles. But while McGovern will occasionally toast a promising excavation with a splash of white wine sipped from a lab beaker, the only suggestion of personal vice is a stack of chocolate Jell-O pudding cups.
The scientific director of the university’s Biomolecular Archaeology Laboratory for Cuisine, Fermented Beverages, and Health, McGovern had had an eventful fall. Along with touring Egypt with Calagione, he traveled to Austria for a conference on Iranian wine and also to France, where he attended a wine conference in Burgundy, toured a trio of Champagne houses, drank Chablis in Chablis and stopped by a critical excavation near the southern coast.
Yet even strolling the halls with McGovern can be an education. Another professor stops him to discuss, at length, the folly of extracting woolly mammoth fats from permafrost. Then we run into Alexei Vranich, an expert on pre-Columbian Peru, who complains that the last time he drank chicha (a traditional Peruvian beer made with corn that has been chewed and spit out), the accompanying meal of roast guinea pigs was egregiously undercooked. “You want guinea pigs crunchy, like bacon,” Vranich says. He and McGovern talk chicha for a while. “Thank you so much for your research,” Vranich says as he departs. “I keep telling people that beer is more important than armies when it comes to understanding people.”
We are making our way down to the human ecology lab, where McGovern’s technicians are borrowing some equipment. McGovern has innumerable collaborators, partly because his work is so engaging, and partly because he is able to repay kindnesses with bottles of Midas Touch, whose Iron Age-era recipe of muscat grapes, saffron, barley and honey is said to be reminiscent of Sauternes, the glorious French dessert wine.