With 50 million views since we started posting video two years ago, TEDTalks have become a powerful cultural force.

To celebrate this milestone, we're releasing a never-before-seen list: the Top 10 TEDTalks of all time, as of June 2008.

With speakers like neuroanatomist Jill Bolte Taylor and global health expert Hans Rosling, the list proves one of the compelling ideas behind TEDTalks: that an unknown speaker with a powerful idea can reach -- and move -- a global audience through the power of quality web video.

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