Add Yahoo as a preferred source to see more of our stories on Google. Find a string. Really. Do it. Now twist, tie and tangle it as much as you like. Finally, attach the two loose ends of your string ...

Q I am new to wearing ties. I know there are different kinds of tie knots (I see knotting directions for three), but I don't know if any are more right with certain clothes than with others. A You are ...

Virtual Knot Theory extends classical knot theory by incorporating virtual crossings alongside traditional over‐ and under‐crossings. Originating from Kauffman’s work in the late 20th century, the ...