Subscribe to the Podcast: http://goo.gl/CemLaj Grey: https://www.youtube.com/user/cgpgrey Brady: https://www.youtube.com/user/numberphile Discussion: http://www.reddit.com/r/CGPGrey/ Brady / Grey discuss: silver play buttons, Apple Watches and knowing nothing about computer security, project revolution pressing, Brady visits Australia-land, the trolley problem and self-drivivg cars, Brady's papercuts, and BREXIT! ## Brought to You By Hover: The best way to buy and manage domain names.

Brady / Grey discuss: silver play buttons, Apple Watches and knowing nothing about computer security, project revolution pressing, Brady visits Australia-land, the trolley problem and self-driving cars, Brady's papercuts, and BREXIT!

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