Arborists depend on several knots for safe climbing and rigging. The most widely used arborist knots include bowline knots, figure eight knots, distel knots, and Prusik knots. Per the National ...

The bell above the door rings. Madame Bernard doesn’t look up. She’s elbow-deep in dough, sleeves rolled high, her neck slick ...

The answer has its roots in Portuguese, Dutch, and English sailors who needed a way to tell how fast they were going in an ...

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

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