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[Discover] Stop boring us with your crappy slideshows and watch Death By PowerPoint http://www.core77.com/blog/education/stop_boring_us_with_your_crappy_slideshows_and_watch_death_by_p ...
(hiperactivo true powerpoint) 
[Discover] What is humanity's capacity to feed itself? | MetaFilter http://www.metafilter.com/68106/What-is-humanitys-capacity-to-feed-itself (hiperactivo economics exponential growth)
[Discover] Moving beyond money. | Ask MetaFilter http://ask.metafilter.com/77619/Moving-beyond-money (hiperactivo economics barter scifi)