Archaeology · Observations · Science · Ethnography
Vessels 4,500 years old with traces of beer or grog found in northeastern Poland
Thirteen vessels 4,500 years old have been found in north-eastern Poland. Nine of them bear chemical traces of fermentation: lactic, acetic and levulinic acids, the by-products of yeasts and bacteria, and biomarkers of wheat and barley, fruit and resins. The researchers from the University of Warsaw call