Michael Jackson reportedly was very interested in being cloned. But it's not so easy.
Scientists clone a beam of laser light, but the technique is not perfect. Forty years ago in a similar Sci-fi experiment, the Enterprise's transporter made a flawed copy of Captain Kirk.
Hair is a better source of ancient DNA than bone or muscle, a woollymammoth study suggests.
Leading geneticist asks scientists to create stem cells with animal eggs.
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