Whether you have no idea what data visualization is, how it can be used a storytelling medium, or already love it and want to learn more, check out this video produced during the 2009/10 Knight Journalism Fellowship. And if you've already seen it, it's worth a refresher.

The video is broken down into eight chapters: introduction; data visualization in journalism; telling "data stories"; a new era in infographics; life as a data stream; exploring data; technologies and tools; and first steps. Each video section plays in tandem with a steam of information, and related links, in a space underneath the video.

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Total running time for all eight sections is 54 minutes.