People: Dr. Max Aguilera-Hellweg, doctor and photojournalist

Dr. Max Aguilera-Hellweg, photographer of these beautiful images for National Geographic's article on stem cells, was a successful photojournalist before he decided to become a doctor. He went back to school for the first time, and enrolled in pre-algebra, at age 39, and enrolled in medical school at 44. He was given the assignment by National Geographic while in his first year of residency.

Cool, huh?