Why Is the US Army Investing In 4D Printing?

A new grant from the U.S. Army Research Office will split $855,000 between three research teams working on so-called "4D printing." By military budget standards, that’s chump change—but it hints at a huge future for a technology that’s been lingering on the horizon for years. » 10/09/13 2:00pm 10/09/13 2:00pm