I test a few hypothesis as to why gauge blocks stick together by seeing how they stick with almost all the air removed. AVE's channel: https://www.youtube.com/user/arduinoversusevil recommended AVE viewing: Gauge blocks; https://www.youtube.com/watch?v=gbsd2... Cold welding of gold; https://www.youtube.com/watch?v=mHAhf... vacuum welding device: https://www.youtube.com/watch?v=4za2n... music by Dan Wurtzbacher at www.ddubbAUDIO.com Help me make videos by donating here: https://www.patreon.com/Co