Hacker News on 20 February 2013

• Google Glass
• HN is 6 today. Here's traffic since the beginning
• Firefox introduces PDF viewer
• Dolphins Call Each Other By Name
• I'm a shut-in. This is my story
• How we hacked Facebook with OAuth2 and Chrome bugs
• Business in a Box
• Google Glass - If I Had Glass
• The StarCraft path-finding hack
• Sony announces PS4 with 8-core x86 processor, 8GB GDDR5 memory and DualShock 4