Morning Overview on MSN
Why knots come undone in 4D, but 2D surfaces can still be knotted
Tie a trefoil knot in a piece of string, seal the ends together, and try to wiggle it free without cutting. In ...
Hands-on impressions of The Fourth Dimension, an app that attempts to explain 4D geometry. Hands-on impressions of The Fourth Dimension, an app that attempts to explain 4D geometry. The Fourth ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results