Assorted Links #31

• Artist Ron English's April Fool's sign at US-Mexico border
• Thursday by Matthias Hoegg
• The Original Street Art Project
  
• Jacob?s Mechanical robot
• All Solar Power
• 10 Mysterious Underground Cities

Credits: Venice Backstage. How does Venice work?

Source: http://www.thepolisblog.org/2011/04/assorted-links-31.html

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