The brain-scanning MRI machine that was used at Carnegie Mellon University in Pittsburgh, for an experiment on tracking brain data is seen on campus Wednesday, Nov. 26, 2014. (AP Photo/Keith Srakocic)
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The brain-scanning MRI machine that was used at Carnegie Mellon University in Pittsburgh, for an experiment on tracking brain data is seen on campus Wednesday, Nov. 26, 2014. (AP Photo/Keith Srakocic)
