The Fertile Crescent - Initially, the Fertile Crescent was only sparsely inhabited but around 8000 BC, it was in this fertile valley that agriculture was first believed to have ...
http://www.google.com/search?hl=en&lr=&safe=off&as_qdr=all&ei=c5upSZ-SMJm0sQP13ZjlDw&sa=X&oi=spell&resnum=1&ct=result&cd=1&q=%22FERTILE+CRESCENT%22&spell=1
Agriculture - 8,000 years ago.
Thank goodness for global warming. (Temperatures around 8,000 years ago had finally become a bit more stable, and warmer after the last Ice Age.)