Copper and lutetium metal ions chaperone this molecular strand into a three-twist knot. Credit: Credit: Stuart Jantzen, Biocinematics It’s annoyingly easy to tangle your headphones into a mess of ...

TOKYO -- A simple knot, a lasso, a figure-eight knot and a bowline knot. These are just a few of the knots that can be tied by a robot developed at the University of Electro-Communications here.