〈 Berger | Dillon 〉

An object attached to strings can spin continuously without becoming tangled • Note that after a 360° rotation the spiral is reversed, but after 720° it returns to its original state (source: https://en.wikipedia.org/wiki/File:Belt_Trick.ogv …)pic.twitter.com/0ZqOpyGA1t

More generally, an object with 𝑛 strings attached can spin continuously without tangling • In the limit 𝑛→∞, we see that a piece of solid continuous space can rotate in place like this without tearing or intersecting itself (source: https://en.wikipedia.org/wiki/File:Antitwister.ogv …)pic.twitter.com/1s4coVJuu0