This Is Why 4 D Printing Is Cool

This Is Why 4D Printing Is Cool U. S. Army Research Office has just thrown some money the way of 4D printingbut what, exactly, is all the fuss about This beautiful video goes a long way to showing us why the technology is so exciting. The title 4D printing is fairly slippery, but we had a stab at pinning down the concept recently: br, br,