Hacker News on 13 September 2014

• Gravit – Open-source design tool
• Navdy
• Sandwich Video: The company that makes nearly all startup videos
• Dutch Girl Fakes a Trip to South East Asia
• Learning How to Exert Self-Control
• The Future According to Stanisław Lem
• A tiny group of people can see ‘invisible’ colours that no-one else can perceive
• Melting aluminum
• Wifi: “beamforming” only begins to describe it
• We Are Entering the Age of Alzheimer's