Shoelace knots fail catastrophically, thanks to 7 gees' worth of stress

Update: Whoops, David got there first!

In a new paper published in the Proceedings of the Royal Society, researchers from UC Berkeley reveal that shoelace knots do not gradualy come loose, as was previously supposed -- rather, they fail catastrophically and suddenly, thanks to strange and surprising stresses that they must endure. Read the rest

Fold-flat furniture looks like isomorphic illustrations when it's collapsed

Jongha Choi's Master's thesis for Design Academy Eindhoven involved the creation of "De-dimension" furniture, which collapses into a flat, easily stored form when it's not in use -- but when it's in its flat form, it looks like a perspective drawing of its expanded shape. Read the rest

Detangling enthusiasts trade snarled yarn to tease back into order

Online communities like Ravelry's "Knot a Problem" invite knitters to ship them their most tangled yarn, which they patiently unravel and wind into usable skeins, as a kind of knitting-adjacent hobby, one that combines problem solving with topology. Read the rest

Engraving a Klein bottle with an Eggbot

The Evil Mad Scientists were presented with a challenge: inscribe one of Cliff Stoll's hand-blown Klein bottles, an object of surpassing beauty and odd topology. They modified an Eggbot plotter to etch the surface of a Klein bottle with a diamond engraver attachment. Read the rest

Gravity-defying levitating superconductor on a magnetic Möbius strip

Andy from the Royal Institution made a large, suspended Möbius strip out of rare-earth magnets, then cooled down an object until it became a superconductor, and set it levitating and running around the track. The result is amazing, plus Andy's explanation is cogent and fascinating. Plus, gravity-defying levitation!

Levitating Superconductor on a Möbius strip (Thanks, Ed!) Read the rest