Europe's earliest cities relied on fertilizer and plant protein, isotope analysis shows

Nutrition in Trypillia mega-sites is currently the focus of the Collaborative Research Center (CRC) 1266 at Kiel University (CAU). In the forest steppe northwest of the Black Sea—today the territory of the Republic of Moldova and Ukraine—mega-sites of the Trypillia societies emerged about 6,000 years ago on areas of up to 320 hectares in size. With around 15,000 inhabitants, they were the largest settlements in the world at that time.