This link http://www.youtube.com/watch?v=6ILQrUrEWe8 will take you to a 4:45 min vid that explains the changing ways of technology. It demonstrates the different ways to communicate and transmit information and how it has drasitcaly changed within the past century. It has some mind blowing facts and its amazing how much things can change in such a short time!
Enjoy :)
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