Hacker News on 22 September 2012

• Startup = Growth
• The man who singlehandedly carved a road through a mountain
• Ubuntu Will Now Have Amazon Ads Pre-Installed
• Rethinking Sleep
• Facebook Wants You To Snitch On Friends Not Using Their Real Name
• DC Taxi Commission Proposes New Rules to Shut Down Uber
• How to stop hospitals from killing us
• 3D printer community revolting against Makerbot's new closed-source printer
• Thank you Apple
• Ruby’s magic underscore