Adam dives into the awesomeness of the Klein bottle--a classic physical example of a non-orientable surface (eg. a one-sided surface akin to a Mobius strip). Adam's Klein bottle was made by one of his heroes, computer scientist Cliff Stoll--one of the first people to uncover espionage through connected computer systems. This Show and Tell becomes as much a celebration of fourth-dimensional objects as it is the career and story of Cliff Stoll, who Adam hopes to collaborate with one day! You can find Cliff Stoll's klein bottles at www.kleinbottle.com Cliff Stoll's book The Cuckoo's Egg: https://amzn.to/3CB4G6r NOVA episode "The KGB, The Computer, and Me": https://www.youtube.com/watch?v=PGv5BqNL164 Numberphile's episode on Cliff Stoll: https://www.youtube.com/watch?v=-k3mVnRlQLU Disclaimer: Tested may earn an affiliate commission when you buy through the links here Shot and edited by Joey Fameli Join this channel to support Tested and get access to perks: null Tested Ts, stickers, mugs and more: https://tested-store.com/ Subscribe for more videos (and click the bell for notifications): null Twitter: http://www.twitter.com/testedcom Facebook: http://www.facebook.com/testedcom Instagram: https://www.instagram.com/testedcom/ Discord: https://www.discord.gg/tested Amazon Storefront: http://www.amazon.com/shop/adamsavagestested Savage Industries T-shirts: https://cottonbureau.com/stores/savage-merchandising#/shop Tested is: Adam Savage http://www.twitter.com/donttrythis Norman Chan http://www.twitter.com/nchan Joey Fameli http://www.joeyfameli.com/ Ryan Kiser https://www.instagram.com/ryan.kiser Jen Schachter http://www.jenschachter.com/ Kishore Hari http://www.twitter.com/sciencequiche Sean Charlesworth http://www.twitter.com/cworthdynamics Jeremy Williams http://www.twitter.com/jerware Kayte Sabicer https://www.instagram.com/kaytesabicer Bill Doran https://twitter.com/chinbeard Ariel Waldman null Darrell Maloney null Kristen Lomasney https://twitter.com/krystynlo Intro bumper by Abe Dieckman Thanks for watching! #adamsavage #mathematics #KleinBottle