The 3-D Printing Revolution

The 3-D Printing Revolution

Dreams made real, one layer at a time

By Rachel Ehrenberg, 23:38 PM February 20, 2013

Joshua Pearce takes unusual satisfaction in strolling through Walmart. The shelves laden with toys, household items, tools and clothing inspire in him a certain smugness, a pride in American entrepreneurship. But it’s not because Pearce admires the chain as an empire built by a self-made man. Pearce swells with pride at Walmart because the store is full of mass-manufactured objects that he could make himself.

“I take great pleasure — and my wife teases me about it — walking though Walmart a...

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