Why you can’t tie knots in four dimensions
- Written by Zsuzsanna Dancso, Associate Professor of Mathematics, University of Sydney
John M Lund Photography Inc / Getty ImagesWe 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 Einstein’s theory of relativity?
If you have wondered what four dimensions really look...





