I think that the big thing that is hard to fathom is how many fewer people were alive in those days, and how that smaller scale impacted life.
US Census estimates that there were 5-20M people 7,000 years ago. People tend to settle in similar places, so the stuff left over tends to disappear in normal circumstances.
US Census estimates that there were 5-20M people 7,000 years ago. People tend to settle in similar places, so the stuff left over tends to disappear in normal circumstances.