We tie our shoes, we put on neckties, we wrestle with power cords. Yet despite deep familiarity with knots, most people cannot tell a weak knot from a strong one by looking at them, Johns Hopkins ...

consult informative books and guides that dive deep into the art of knot tying. Titles like “The Ultimate Book of Knots” and “Knots for the Outdoors” will provide you with illustrations ...

Now, using algebraic topology, researchers from the UK have developed a scheme for creating optical vortices in propagating laser fields to form knots and links (Nature Phys. 6, 118–121 ...

One example is the reef knot (top) vs. the grief knot (bottom). One is considerably stronger than the other. What does this mean, exactly? According to researchers, people were consistently unable ...