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Now scientists create a sheep that's 15% human 25.03.07   Scientists have created the world's first human-sheep chimera - which has the body of a sheep and half-human organs.The sheep have 15 per cent human cells and 85 per cent animal cells - and their evolution brings the prospect of animal organs being transplanted into humans one step closer.Professor Esmail Zanjani, of the University of Nevada, has spent seven years and £5million perfecting the technique, which involves injecting adult human cells into a sheep's foetus.  Chimera: sheep have 15 per cent human cells and 85 per cent animal cells  He...