Hacker News on 6 July 2019

• Goodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem
• Breaking max efficiency of solar cells by activating 2 electrons with 1 photon
• VPN owners: 97 VPN products run by 23 companies
• So you think you know C? (2016)
• Canonical Ltd source code repositories have been compromised
• 7.1 magnitude earthquake strikes Southern California
• How to Enable DNS-over-HTTPS in Firefox
• Speedy Desktop Apps with GTK and Rust
• Finally an image of X-37B/OTV-5, US Air Force's secretive space plane, in orbit
• A Look at the AMD Zen 2 Core