The CES Level 2 databases have a field called “Date first used (“-” 5 BC). This field allows you to explore the history of development of materials. Plot four Yield strengthDensity charts showing the...

The CES Level 2 databases have a field called “Date first used (“-” 5 BC). This field allows you to explore the history of development of materials. Plot four Yield strengthDensity charts showing the materials available during the Stone Age (10,000 BC), the late Roman empire (300 AD), the Industrial Revolution (1800), and today. The way to do this is explained in the Science Note for the “Date first used” field that you will find if you double-click on the field name.