![TIL that knots do not work in a 4D universe. So if there are fourth dimensional creatures they must keep their shoes on with velcro. : r/todayilearned TIL that knots do not work in a 4D universe. So if there are fourth dimensional creatures they must keep their shoes on with velcro. : r/todayilearned](https://external-preview.redd.it/jgJrynCIgXC6EHD1coUYo2qFEpNVt4LiIKsLV-ZKpOI.jpg?auto=webp&s=ca37ce91add8db2fbd8b4f0466ce4570c9f4490e)
TIL that knots do not work in a 4D universe. So if there are fourth dimensional creatures they must keep their shoes on with velcro. : r/todayilearned
![NanoVelcro device configuration and work mechanism. A. NanoVelcro CTC... | Download Scientific Diagram NanoVelcro device configuration and work mechanism. A. NanoVelcro CTC... | Download Scientific Diagram](https://www.researchgate.net/publication/299516051/figure/fig6/AS:668455023951872@1536383505047/NanoVelcro-device-configuration-and-work-mechanism-A-NanoVelcro-CTC-Chip-is-composed-of.jpg)
NanoVelcro device configuration and work mechanism. A. NanoVelcro CTC... | Download Scientific Diagram
![LandJoy - Cinta de velcro autoadhesiva, cinta adhesiva de doble cara extra fuerte de 8 m, cinta adhesiva de velcro resistente y resistente. : Amazon.es: Bricolaje y herramientas LandJoy - Cinta de velcro autoadhesiva, cinta adhesiva de doble cara extra fuerte de 8 m, cinta adhesiva de velcro resistente y resistente. : Amazon.es: Bricolaje y herramientas](https://m.media-amazon.com/images/S/aplus-media/sc/2971b128-1dad-47d9-83da-97b444526f4e.__CR0,0,970,300_PT0_SX970_V1___.jpg)