654877bd_erials_Science_and_Engineering__Significance
[Date] 5000 BC (estimated) [Candidate Moment] In and around modern Turkey, people discover that liquid copper can be extracted from malachite and azurite and that the molten metal can be cast into different shapes. [Significance] 
Introduces extractive metallurgy--the means of unlocking the Earth's mineralogical treasures.
Greatest Moments in Materials Science and Engineering
Significance