You can tie as many butterfly knots into a single line of rope as needed, which is especially handy with multiple climbers on a line of rope. But it's not just useful for climbing. The alpine ...

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 ...

The fly starts with a size 10 Lightning Strike SN3 streamer hook. Make sure the 3X long hook is well-secured in the jaws of ...