When we say that Erik Demaine has spent the best part of the past two decades folding paper into funny shapes, it’s a bit more impressive than it sounds. In fact, as an 18-year-old Ph.D. student (yes, ...

If you want to print something a few inches tall, extruded plastic is a good medium. But when you need something at the nanometer scale, DNA is a better bet — but who has the time to design and ...