By George Hart for the Museum of Mathematics

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Whittling is a traditional technique for making one-of-a-kind objects that doesn’t get enough attention nowadays. A time-old method of demonstrating one’s whittling technique is to carve linked objects from a single piece of wood. The above step-by-step guide shows four stages in making a pair of linked hearts from a single block.

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Bjarne Jespersen, a Danish carver with geometric interests, creates not just linked hearts, but intricate linkages of knots. The above image shows a beautifully symmetric 10cm carving of four interlocked trefoil knots from a single piece of wood. The components are free to jiggle just slightly.

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Even harder, here are six interlinked paths forming a tangle with dodecahedral symmetry. It has twelve five-fold openings like the one at the center of the image. Again, it is carved from a solid block and the individual parts are just free to wiggle a bit.

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Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor for Boing Boing and WINK Books. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.