Engineered DNA Make Nano-Machines
Engineers have built simple folding machines the size of molecules out of snips of synthetic and natural DNA. The nano-machines, like the opening and closing hinges shown above, can repeatedly perform the task for which they are designed.
Mechanical engineers at The Ohio State University built these objects using the long-understood principles of human-sized machine design. They say this approach to building 3-D constructs out of DNA is different from other groups, which are instead trying to build complex, static shapes or mimicking the structure of biological systems.