Scientists find yeast in frozen mummy's guts, use it to make sourdough bread

Yeast has been growing in the guts of a frozen mummy called [ Oetzi the Iceman ][27] for thousands of years, scientists have discovered, telling AFP they used it to make a sourdough bread. More than 5,300 years ago — before the Egyptian pyramids were built — Oetzi was strolling through the Alps on...