There's a nice short New Scientist video of this too on You Tube: http://www.youtube.com/watch?v=uGv2RoV3xyo&feature=channel
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New Scientist video 'Master Stroke'
There's a nice short New Scientist video of this too on You Tube: http://www.youtube.com/watch?v=uGv2RoV3xyo&feature=channel