scientists have proven the existence of one major climate phenomenon that changed living conditions throughout the mediterranean region. six thousand so i don't know in approximately sixty two hundred b.c. and ice dam in north america collapsed and that caused two huge lakes to pour their contents into the atlantic ocean stock up the crude this major inflow of water interrupted the gulf stream for more than a century that in turn produced cooler temperatures in the mediterranean region perhaps one or two degrees celsius the middle. and there was a big drop in precipitation when these phenomena posed a real threat to early neolithic peoples who does include two and on the edge to the point understood. perhaps that's why people abandon the by ya settlement even today jordan suffers from water shortages and in summer temperatures often rise