Dr. Amy Farrah Fowler (Mayim Bialik) is a neuroscientist (which corresponds to Bialik's real-life Ph.D.), and Sheldon's love interest in the series. She has a Ph.D. in neurobiology, with a research focus on addiction in primates and invertebrates, occasionally mentioning such experiments as getting a capuchin monkey addicted to cigarettes or starfish addicted to cocaine. Raj and Howard found Amy through an online dating site after secretly setting up an account using Sheldon's name and information. The site matches her to Sheldon, and the two share many similar traits. Once she and Sheldon meet, she becomes, as Sheldon puts it, a girl who is his friend, but not his "girlfriend." They briefly ended their friendship when they got into an argument over whose field of study was superior. The two initially communicate via computer, but at the encouragement of the group, she starts hanging out with the gang in person.