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Blood Vessels in the Earth
![Srucara's picture Srucara's picture](https://serendipstudio.org/exchange/files/pictures/picture-1126.jpg)
Image courtesy of U.S. Geological Survey and Nasa.
Satellite Image of Yukon Delta in Alaska.
http://www.nasa.gov/mission_pages/landsat/news/40th-earthasart.html
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