When researchers zero in on electrical activity in yet another area, they can tell which parts of commercial messages, if any, are encoded in the experimental subjects' long-term memories.
The centre of world economic and commercialactivity from about the eighth and ninth centuries until around the dawn of the 18th century was the area encompassed by the Islamic empires, India, Southeast Asia and the coastal areas of China.
There is a lot of hustle and bustle, a little bit of commercialactivity as they are trying to rebuild the city from the fighting that took place there and somewhat devastated the area back in 2004.