Showing posts with label dprjones. Show all posts
Showing posts with label dprjones. Show all posts
Monday, November 2, 2009
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This work by Keippernicus is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
Metal enough to stop X-rays
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This work by Keippernicus is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.