I think this is very interesting. The link has advertisments you have to wait till they are over to see the video.
http://video.msn.com/v/us/v.htm?g=80EFBB61-1E7E-4B34-B3EB-45FED3AADD44,19DF2F82-CF5A-40A5-9E09-409E5A49414C&t=c232&f=06/64&p=Source_National%20Geographic&fg=>1=9246
http://video.msn.com/v/us/v.htm?g=80EFBB61-1E7E-4B34-B3EB-45FED3AADD44,19DF2F82-CF5A-40A5-9E09-409E5A49414C&t=c232&f=06/64&p=Source_National%20Geographic&fg=>1=9246
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