http://tags.gizmodo.com/assets/base/img/thumbs140x140/gizmodo.com.png http://gizmodo.com/tag/hamsterpower http://gizmodo.com/tag/hamsterpower The answer is four, say scientists at Georgia Tech. If you are high now or plan to be soon, watch this video a few times. You can thank me later. [Full Story: Technology Review]

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