Gregory A. Petsko is Professor of Neurology at Harvard Medical School and Brigham & Women’s Hospital in Boston, and Adjunct Professor of Biomedical Engineering at Cornell University. He has been elected to the National Academy of Sciences, the National Academy of Medicine, the American Academy of Arts and Sciences, and the American Philosophical Society. He has founded several publicly traded and private companies and serves on the advisory boards of MeiraGTx, Retromer Therapeutics and Annovis Bio. His current work aims to develop treatments for neurodegenerative diseases, including ALS, Alzheimer’s, and Parkinson’s.  As a biotech entrepreneur, he has co-founded four companies: ArQule (later sold to Merck), Ironwood Pharmaceuticals (NASDAQ: IRWD), Aevum Therapeutics, and Retromer Therapeutics. The last two are focused on finding therapies (both biologics and small molecules) for Parkinson's and Alzheimer's diseases, respectively. His public lectures on brain health have attracted a wide audience (one of his TED talks has been viewed over a million times). He has written a widely-read column on science and society, the first ten years of which are available in book form.  (He admits, however, that the columns guest-written by his two dogs, Mink and Clifford, are more popular than those he writes himself.) On October 24, 2023, he was presented with the National Medal of Science by President Joe Biden. (The National Medal of Science, established in 1963 by President John F. Kennedy, is the highest honor the United States can bestow on a scientist or engineer.)