Humans began to make alloys about 5,000 years ago, including copper and tin to produce bronze. Since then, alloy design has dramatically advanced, says Monesh Upmenu, Professor of Mechanical and Industrial Engineering at Northeast University.

Humans began to make alloys about 5,000 years ago, including copper and tin to produce bronze. Since then, alloy design has dramatically advanced, says Monesh Upmenu, Professor of Mechanical and Industrial Engineering at Northeast University.