3D printers are affordable enough that almost anyone can buy one, but should you? Before you dive in, here's what to consider—about materials, possible uses, software, and much more. Since 2004 ...
Researchers have created microscale robots less than 1 millimeter in size that are printed as a 2D hexagonal 'metasheet' but, with a jolt of electricity, morph into preprogrammed 3D shapes and crawl.