I broke my whole brain and cut off a bunch of paper: it turns out if you cut the tape of Mebius exactly in the middle the first time, it doubles in length and twists again, and if you cut it again in the middle you get two strips wrapped together!!! Try it!! And that’s not her only interesting property.

Who in childhood wrote a journal "Quantum" and read "Interesting Geometry" of Perelman, he knows. I’m glad the kids are excited about this again :)