Bridges made of pebbles [lecture]

Yet another prezi, from a lecture I gave on citizen journalism and new forms of news dissemination. I discuss digital content dynamics [scarcity/abundance, economy of access], the transition from gatekeeping to gatewatching [Axel Bruns],  analyse Slashdot and Reddit, and use Steven Johnson’s metaphor of Twitter story development as a suspension bridge made of pebbles to illustrate the rising value of aggregation.