11. She has her PhD in Neuroscience from UCLA.
Mayim may've spent much of her youth in Hollywood, but always knew she wanted to go to college one day. After five years of undergrad (with a minor in Hebrew and Jewish Studies), she then went on to complete seven more to earn her PhD in Neuroscience. “I taught for five years after that, with a baby on my chest for half of it," Mayim said, laughing, on a daytime talk show.
Her knowledge of the field has come in handy on The Big Bang Theory set, where her character, Amy, has the same occupation.