- Think 3-D printing is cool? Try 4-D http://www.cnn.com/2013/04/10/tech/innovation/orig-ideas-4-d-printing/index.html?sr=reddit 3 comments technology
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- Breaking News, Latest News and Videos | CNN https://www.cnn.com 108879 comments
- TED: Ideas Worth Spreading http://www.ted.com 61 comments
- Self-Assembly Lab http://www.selfassemblylab.net/ 0 comments
- Obama's speech highlights rise of 3-D printing | CNN Business http://www.cnn.com/2013/02/13/tech/innovation/obama-3d-printing 0 comments
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