http://archaeologyinbulgaria.com/2015/05/18/prehistoric-people-in-bulgarias-yabalkovo-had-domesticated-chickens-ate-europes-first-omelette-8000-years-ago-archaeologist-reveals/
Prehistoric People in Bulgaria’s Yabalkovo Had Domesticated Chickens, ‘Ate Europe's First Omelette’ 8,000 Years Ago, Archaeologist Reveals