Discover the meaning of Celtic knots: timeless symbols of eternity, interconnectedness, and infinite cycles of life, love, ...

Whether you're an experienced adventurer or new to the game, there are a few knots that you should know how to tie. Here are three of the most useful knots, hitches, and bends. Red cordage tied ...

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 ...