Dr Barbara Natterson-Horowitz is a cardiologist and Professor at Harvard University’s Department of Human Evolutionary Biology. Dr Natterson-Horowitz also co-directs UCLA’s Evolutionary Medicine Program and is a Professor of Medicine at UCLA's Division of Cardiology. As well as being a physician Dr Natterson-Horowitz has also had the unique experience of operating on dozens of different species of animals, working as a consultant surgeon for the Los Angeles Zoo. She has operated on everything from apes to birds, big cats to sea mammals.

Along with veterinarian Kathryn Bowers, Dr Natterson-Horowitz wrote the book ‘Zoobiquity: The Astonishing Connection Between Human and Animal Health’ where she shares her multispecies patient insights. The book became a New York Times bestseller.