John Logan Brock doesn鈥檛 remember when he first wanted to be a medical doctor, but in kindergarten, he didn鈥檛 nap with his classmates. He used nap time to peruse human anatomy books, and to ask his teacher how old she was so he could calculate her number of red blood cells. Brock, 21, is graduating from CU-Boulder with a bachelor's in neuroscience and a minor in economics.