On: Why can you turn clothing right-side-out?

[shadowsun7]

I'd love to know more about knots. Some links, please?

[Natsu → shadowsun7]

You want to look up "knot theory." This should get you started, at least:

http://en.wikipedia.org/wiki/Knot_theory

http://www.math.unl.edu/~mbrittenham2/ldt/knots.html