This is the cutting-edge science behind one of the most popular sci-fi series ever. New "Doctor Who" series starts in April 2007. Written by the editor of the popular BBC "Focus" magazine, it covers everything from how Daleks climb stairs to regenerating like the Time Lord. You can discover: why time travel isn't ruled out by the laws of physics; the real K-9 - the robot assistant for space travellers built by NASA; how Dalek-like designer lifeforms are being bred by genetic engineering; why before long we could all be regenerating like a Time Lord; and the medical truth about the Doctor's two hearts, and the real creature with five. 
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