10 Big Breakthroughs: A History Of Accelerating Technology Innovation

3-D Printing Of Physical Objects

The age of 3-dimensional printing of physical objects, including violins and guitars, is on the horizon, says Kurzweil. That breakthrough has been made possible by 3-D printers that at one time cost hundreds of thousands of dollars and now cost thousands of dollars. With 3-D printing soon reaching the sub-$1,000 and sub-micron level, Kurzweil says, it will soon revolutionize manufacturing. "We can already print out some very exciting things," he says. "An airplane was printed out which flew!"

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