Baking Bread With 5,000-Year-Old Yeast From Otzi the Iceman

A team of researchers from Eurac Research has successfully baked a loaf of sourdough bread using yeast strains harvested from the 5,300-year-old remains of Otzi the Iceman. Found in the Alps near the Italy-Austria border, the mummy provided a surprising source of living microorganisms adapted to extreme sub-zero temperatures.

Microbiologist Mohamed Sarhan led the effort to isolate the yeast, noting that the survival of these microorganisms at a constant -6 degrees Celsius is highly unexpected. While the team believes the yeast likely colonized the body after death rather than originating from the man himself, the discovery offers a rare look at ancient biological activity. The initial baking process required a 24-hour fermentation period, producing a dough that rose similarly to modern commercial varieties. Although Sarhan admitted his lack of prior baking experience left room for improvement in the final loaf, the technical success of the experiment has opened doors for further culinary applications. The team is currently in discussions with experts at the German Weihenstephan Brewery to determine if these cold-adapted strains can be effectively used to brew beer, marking a unique intersection between archaeology and modern food science.