Assorted Links

1. The economics of skyscrapers
   
   
2. Mapping Scientific Collaboration, inspired by the Facebook worldwide friendships mapped which in turn was supplemented by 'Filling in the black holes of the Facebook friendship map')
   
   
3. Picasso’s Light Paint (1949)
   
   
4. The Power of Comparison: Just How Big Is It? Try the BBC tool.
   
   
5. Compare crime rates in different England cities
   
   
6. More than 27 million online house hunters each month use the real estate search site Trulia. And they show you where people have been searching for homes in the USA since 2007.

Soundtrack: Retrato para iaia