In this river valley, archeologists discovered the earliest civilizations dating back to 3500bc.

Which of these jobs in colonial america was known for being dangerous? a. milliner b. cooper c. fisherman d. shipbuilder

How did the roaring 20s mark the end of the progressive era? a. mass production reduced wealth disparity and turned public opinion pro business b. labor unions won big legislative gains in workers rights and disbanded c. public officials cut taxes on businesses and reduced spending on services d. america increasing influence in world affairs redirected public attention to foreign policy

When did paul zoll develop cardiac pacemaker