Hacker News on 5 May 2012

• Who Killed Men's Hats? Think Of A Three Letter Word Beginning With 'I'
• Perspective: All of Earth's Water in a Single Sphere
• Linux's awesome and underused traffic control facilities
• Indian drug company slashes crucial medicine prices by 76%
• How not to ask questions at a conference
• Understanding database normalisation: a very short tutorial
• Write hybrid CPU/GPU programs in Haskell
• Interviews Can Be a Terrible Way to Identify Good Programmers
• Facebook Stops You From Posting ‘Irrelevant Or Inappropriate’ Comments
• Opa replaces Javascript, HTML, CSS, PHP, and SQL with one unified language.