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Hello there.

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

Klein Bottle Postage

Klein Bottle Postage

Brady Haran
Cliff Stoll, Glass, Klein Bottles

Klein bottle enthusiast Cliff Stoll shows us his unique system for sending bottles to customers.

Cliff's online store: https://www.kleinbottle.com

More videos on our Klein Bottle playlist: http://bit.ly/KleinBottles

Cliff Stoll playlist: http://bit.ly/Cliff_Videos

Podcast with Cliff: https://youtu.be/lxdcBD4ppF0

Perfect Goal Kicking Angle

Perfect Goal Kicking Angle
The Distance Between Numbers

The Distance Between Numbers