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Tracking an astronomical mystery

Aug 9, 2012
Photo courtesy of Google Earth Pro

For centuries people have lived and worked in a part of coastal Peru spotted with oddly shaped hills.  Most knew that the mounds were man made, but were they significant?  

Tracking an astronomical mystery

Apr 12, 2012
Photo courtesy of Google Earth Pro

For centuries people have lived and worked in a part of coastal Peru spotted with oddly shaped hills.  Most knew that the mounds were man made, but were they significant?