Dr. Marx received his degree in veterinary medicine from Cornell University and did emergency medicine and small animal practice for several years after graduation. He then returned to school and did a PhD in Kinesiology at Penn State University. After performing an NIH-funded postdoctoral fellowship, he did a residency in laboratory animal medicine at UPenn, became a diplomate of the American College of Laboratory Animal Medicine and accepted a faculty position at the veterinary school at UPenn. In addition to his clinical work, Dr. Marx’s research focus is to improve the care and welfare of mice used in biomedical research. This takes on two distinct arms, one focusing on the diagnosis and treatment of spontaneous diseases of mice in research and secondly, in the anesthesia of mice. The small size and high metabolic rate of mice creates many challenges in anesthetizing mice. Dr. Marx’s work in this area has focused on developing new anesthetic protocols, refining the supportive care and enhancing the monitoring of anesthetized mice. In his free time, Dr. Marx enjoys spending time with his family and dogs and discussing mouse anesthesia with anyone foolish enough to get him started on the topic.