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    Think 3-D printing is cool? Try 4-D

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Think 3-D printing is cool? Try 4-D

TED Senior Fellow Skylar Tibbits on his new technology that could revolutionize 3-D printing.

Think 3-D printing is cool? Try 4-D

TED Senior Fellow Skylar Tibbits on his new technology that could revolutionize 3-D printing.