How did the land between the Tigris and Euphrates rivers support agriculture?

Think about the items and services that you and your family buy or consume. what causes you to pay the prices that you do for these goods and services? what determines the price that's on the price tag? what goes into determining, or setting, that price? consider all the possible elements that could influence the prices you pay.

Some european explorers sailed west looking for the passage to india

What is the cause of their extinction