Post #5282 907 Mar 2, 2026, 10:15 UTC Why you can't tie knots in four dimensionsSource: Phys.org@EverythingScience phys.org Why you can't tie knots in four dimensions We all know we live in three-dimensional space. But what does it mean when people talk about four dimensions? Is it just a bigger kind of space? Is it "space-time," the popular idea which emerged from ... ❤ 4