Hacker News on 21 July 2019

• How is it like to be a dev in Iran
• YouTube was launched as a dating site
• Photorealistic Path Tracer
• Why wasn't this page found?
• Browsers are pretty good at loading pages
• Game Source Code Collection
• Edge sends full URLs of pages visited to Microsoft
• Google AI Education Resources
• Puffer – Stream live TV in the browser
• Satellite Images Show Vast Swaths of the Arctic on Fire