Tie a trefoil knot in a piece of string, seal the ends together, and try to wiggle it free without cutting. In three-dimensional space, the knot holds firm. Add a fourth spatial dimension, however, ...

Soft shackles are finding wider acceptance as reliable connectors. Harken's version of the soft shackle has a T-shaped closure and Dyneema sheath. Courtesy Harken We all know how critical sail shape ...

Deciding whether a knot is fit to be tied just got a bit more scientific. Some knots are stronger than others, but scientists have struggled to explain why. Now, with the help of color-changing fibers ...

Oliver O’Reilly was teaching his daughter to tie her shoes when he realized something: he had no idea why shoelaces suddenly come undone. When he went looking for an answer, it was apparent that no ...