Hacker News on 18 January 2019

• I interviewed at six top companies in Silicon Valley in six days
• My dog was killed on a walk with a walker ordered through Wag
• Ask HN: How to self-study mathematics from the undergrad through graduate level?
• 50 Years Ago, the Sugar Industry Paid Scientists to Blame Fat (2016)
• Twins get different results when they put 5 ancestry DNA kits to the test
• 773M Password ‘Megabreach’ Is Years Old
• Costco opening a $440M chicken farm to escape America's chicken monopoly
• Sequel Pro – Open source macOS native MySQL GUI client
• Inkscape launches versions 0.92.4 and 1.0 alpha
• A Fifth of China’s Homes Are Empty (2018)