Who was the French professor that the Robert brothers built the world's first hydrogen balloon for?
Jacques Charles Jacques Alexandre César Charles (November 12, 1746 – April 7, 1823) was a French inventor, scientist, mathematician, and balloonist.
Jacques Genest Jacques Genest {'1': ", '2': ", '3': ", '4': "} ( ; born May 29, 1919 in Montreal, Quebec) is a Canadian physician and scientist. He is a professor at McGill University. Dr. Genest is best known for founding and leading several organizations related to clinical research in Québec and for his work on arterial hypertension.