A new way to make structures from folded RNA has been discovered. Nucleic acids previously have been used to make two dimensional arrays and three dimensional polygons. Now it appears they can make three dimensional arrays as well.
This is another tool in the toolbox of ways to make large structures out of molecules. It's worth noting that the researchers talk about "incorporating these nanomachines into nanodevices." In fact, one of their quotes sounds a lot like molecular manufacturing...
Living systems contain a wide variety of nanomachines and ordered structures, including motors, pumps and valves. Our research is devoted to making these machines function outside their native environment.
Molecular manufacturing promises high-performance materials, vast numbers of features, and amazingly cheap manufacturing. Biochemical and self-assembly approaches to nanotechnology can deliver significant fractions of these promises, as well as providing stepping-stones toward full molecular manufacturing.