This undated photo combo provided by the journal Cell and taken with a bright field camera, shows a mouse with its skin removed during various stages of examination. In a study released by the journal Cell on Thursday, July 31, 2014, researchers describe a way to make see-through mice and rats, a step that should help them study fine details of anatomy for basic research. The left image shows the mouse with the skin removed. The right image shows the mouse after one week of the process. (AP Photo/Cell, Yang et al)
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