Who was born earlier, Franz Viehböck or Jean-François Clervoy?
Jean-François Clervoy Jean-François André Clervoy (born 19 November 1958) is a French engineer and a CNES and ESA astronaut. He is a veteran of three NASA Space Shuttle missions.
Franz Thonner Franz Thonner (11 March 1863 – 21 April 1928) was an Austrian taxonomist and botanist from Vienna. In the spring of 1896 he made his first trip to the African interior to explore the botany and people in the northern part of the Congo Basin. Besides his comprehensive collection of plants, he embarked on a thorough ethnographic study of the region.