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The Big Bang Theory star is a real-life nerd. Turning down Harvard and Yale, Bialik received a B.S. in neuroscience, Hebrew studies and Jewish studies in 2000 and her PhD in 2007. Her dissertation was titled "Hypothalamic Regulation in Relation to Maladaptive, Obsessive-Compulsive, Affiliative, and Satiety Behaviors in Prader-Willi Syndrome."