Engineering an Empire !

Well,after the great disapointment of 300 as a movie which is clearly made to keep people busy and angree!!!!! , I received an e-mail including some you-tube links which I strongly suggest you to check'em out.
They seem to be linked to National Geographic.

Part 1:
http://www.youtube.com/watch?v=eKN-gZuSH2o&mode=related&search =

Part 2:
http://www.youtube.com/watch?v=pdqmdB_Sbtc&mode=related&search =
Part 3:
http://www.youtube.com/watch?v=bykHGRD_BZ4&mode=related&search =

Part 4:
http://www.youtube.com/watch?v=WNWmaMTTesI&mode=related&search =

Part 5:
http://www.youtube.com/watch?v=tFPoe06ThRU&mode=related&search =