Hacker News on 20 April 2014

• SpaceX Dragon Successfully Docked With The Space Station
• Postman: a powerful HTTP client (for Chrome) to test web services
• The Invention of the AeroPress
• Metacademy
• Ask HN: Idea Sunday
• Did removing lead from petrol spark a decline in crime?
• Man compares his prosthetic hand to a 3D-printed one
• Spoofing the Samsung Smart TV Internet Check
• “Don't fuck up the culture” – A letter to the Airbnb team
• No, don't enable revocation checking