died quietly on 7 January 2020 at a hospice in Providence, Rhode Island, USA, surrounded by his immediate family. He was 82 years old, and had been hospitalized for a few weeks due to heparin-induced thrombocytopenia following a minor heart surgery. His numerous successful academic offspring, his seminal papers, and his service to the field, to the community and to his family have proven him to be a man of wisdom, grace and integrity. Now, the world is somewhat less than it was just a short

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... e ago. A genuine scholar and a gentleman With Don's passing, we have lost an icon and leading figure in comparative cardiorespiratory physiology. For almost 60 years, his sharp, inquisitive mind provided novel insight into the regulation of ventilation and blood gases and he pioneered our understanding of anoxia tolerance in animals. The vast majority of his studies were performed on turtles, but his findings were always placed in a broader context and provided general insight into 'how animals function'. In addition to Don's considerable scientific productivity, he was an attentive and supportive supervisor, a devoted teacher, and he contributed to academia at large by serving as editor for the American