Hacker News on 20 January 2015

• µBlock for Firefox
• Eigenvectors and eigenvalues explained visually
• So I need to be sad, bored and happy to be creative
• Google Nears $1 Billion Investment in SpaceX
• HealthCare.gov Sends Personal Data to Dozens of Tracking Websites
• SpaceX Sells 10% Stake to Google, Fidelity for $1B
• Working at Netflix
• The Ronco Principle
• Coinbase Raises $75M from DFJ Growth, USAA, NYSE, and More
• Why Explore Space? A 1970 Letter to a Nun in Africa