Learn how to tie the Alpine Butterfly Loop — a strong, dependable knot for creating a fixed loop in the middle of a rope.

Welcome to my channel Mr Sagoo where you will learn how to make an idea with your own hands. Waiting for your support! Other ...

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

City planners have started to put in place the final pieces for a massive new reservoir to be constructed on Billings' West End.