Tumblr founder David Karp took the stage during the keynote speech at the 2014 International Consumer Electronics Show. He talked about Tumblr's power and the future of the platform. Find more Yahoo ... more 
Tumblr founder David Karp took the stage during the keynote speech at the 2014 International Consumer Electronics Show. He talked about Tumblr's power and the future of the platform. Find more Yahoo videos on Yahoo Screen, and download the app in the Apple App Store. less 
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Tue, Jan 7, 2014 7:25 PM EST