Ancient Alpine mummy yields yeast for modern bread

Scientists have extracted living yeast from the preserved gut of Ötzi the Iceman, the mummified human remains discovered in 1991 on the border between Austria and Italy, and used the microbe to produce sourdough bread. According to CBS News, the yeast has survived in Ötzi's frozen remains for more than 5,300 years—predating the Egyptian pyramids—and remains viable for fermentation. The discovery adds a new dimension to one of archaeology's most celebrated finds and reinforces the Austro-Italian Alpine border as a site of scientific and historical importance.

Ötzi was found in the Ötztal, a valley in the Austrian Tyrol roughly 150 kilometres north of the Aosta Valley. The remains, preserved in glacial ice at an altitude of 3,200 metres, have provided unprecedented insight into Chalcolithic Alpine life: his clothing, tools, diet, and even the copper-tipped arrow that killed him. The yeast discovery extends that knowledge into the microbial world—revealing not only what Ötzi ate but what microorganisms inhabited his body and the Alpine environment he moved through.

The finding has reignited international interest in Ötzi and the broader question of how humans adapted to high-altitude Alpine environments in prehistory. For Valle d'Aosta, which sits at similar elevations and shares the same Alpine ecology, the discovery underscores the region's role in European archaeological understanding. The Aosta Valley has its own Neolithic and Bronze Age sites, though none as dramatically preserved as Ötzi. The Iceman's yeast story draws global attention to the Alps as a place where ancient life can be recovered and studied in extraordinary detail.