University of California
Univ. Of California, Davis: Chapter 4: The Bronze Age
Use this site to learn about how bronze was made and how bronze, and its numerous uses, aided in the advancement of many groups of people. This detailed article adresses bronze use in China, Egypt, and the Mediterranean region. Site by...
Wikimedia
Wikipedia: Iron Ore
Wikipedia provides a description of iron ore, where it can be found, and how it is used in the making of steel.
Archaeological Institute of America
Archaeological Institute of America: Early Iron Smelting
Tells about an archaeological dig that may have uncovered one of the oldest instances of iron smelting ever. (V. 53 No. 1, Jan./Feb. 2000 )