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Hello there.

This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Unexpected Shapes (Part 1)

Unexpected Shapes (Part 1)

Tadashi Tokieda cuts various combinations of loops and Mobius loops - with surprising results.

Part 2: https://youtu.be/mh3eMt09EAs
And more: http://bit.ly/tadashi_vids

Unexpected Shapes (Part 2)

Unexpected Shapes (Part 2)

Cutting a Klein Bottle in Half

Cutting a Klein Bottle in Half