I built a QR code with my bare hands to see how it works

How do QR codes work? The checkerboard patterns taking over the world, demystified. Go to https://Saily.com/veritasium and use the code ‘veritasium’ to get an exclusive 15% off your first purchase. Special thanks to Mashiro Hara and Yuki Watanabe. 00:00 I was wrong 00:49 How Morse Code revolutionized communication 03:57 How barcodes work 10:34 How QR codes store information 18:16 Why damaged QR codes still work 29:54 Why are QR codes so common? 31:21 How safe are QR codes? 32:25 The future of QR codes If you’re looking for a molecular modeling kit, try Snatoms, a kit I invented where the atoms snap together magnetically. https://snatoms.com/ ▀▀▀ References: https://ve42.co/QRCodeRefs Images & Video: 1940’s grocery store - H.I.C - https://ve42.co/1940sShop Why Americans Are Obsessed With Peanut Butter via Youtube - https://ve42.co/PeanutButter1 Jif Peanut Butter 90s Commercial (1998) via Youtube - https://ve42.co/PeanutButter2 Vericode Symbol via Youtube - https://ve42.co/Veri