Hacker News on 13 February 2019

• Why can’t a bot tick the 'I'm not a robot' box?
• SQL: One of the most valuable skills
• Nasa’s Mars Rover Opportunity Concludes a 15-Year Mission
• Whitespace killed an enterprise app
• The Tech Behind SpaceX’s New Engine
• FCC threatens carriers with 'regulatory intervention' over robocalls
• Earnest Capital is live
• The text of Article 13 and the EU Copyright Directive has been finalised
• Leon: An open-source personal assistant
• Show HN: DeskGap – Like Electron, but uses the system webview