Scientists Baked Bread Using Yeast from Γtzi the Icemanβs 5,000-Year-Old Mummy and They Say It Tasted βVery Goodβ ZME Science By: Tibi Puiu 4 June 2026 at 14:37 His 5,300-year-old body still hosts cold-loving microbes β and possibly bread-making yeast.