A&E Television
History.com: 5 Iron Age Tools and Innovations
New techniques helped make iron stronger -- but there were also innovations in the use of gold, silver and stone. "The earliest iron objects in the world...start showing up around 3000 B.C.," says Nathaniel Erb-Satullo, a lecturer in...
US Department of Labor
Bureau of Labor Statistics: Photgrapher
Use this site to learn about the career of a photographer. This Bureau of Labor Statistics website includes information on various types of jobs photographers do as well as they pay they earn.