Most medical students study a specialty they hope will define their career. I for instance studied the Peloran Treatments. We’ve been trying to break them down so we could understand them better for centuries, and I was following that path. Rosalie and Rosalind had a far more altruistic specialty in mind. They wanted to improve the integration of various uplifted species into our society. Cats and dogs are the most famous, but various real doctors and crackpots alike have implanted better brains in all kinds of creatures from Earth and beyond. What is far more rare is modifying their vocal cords so they can talk, or giving them opposable thumbs so they can use tools. My two girls wanted to fix that oversight.