The Week in Photos

In this undated photo provided by the Chinese Academy of Sciences, cloned monkeys Zhong Zhong and Hua Hua sit together with a fabric toy. For the first time, researchers have used the cloning method that produced Dolly the sheep to create two healthy monkeys, potentially bringing scientists closer to being able to do that with humans. (Sun Qiang and Poo Muming/Chinese Academy of Sciences via AP)

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