20th-century French scientists

Jean-Jacques Favier (13 April 1949 – 19 March 2023) was a German-born French engineer and a CNES astronaut who flew aboard the STS-78 NASA Space Shuttle mission in 1996. Favier was due to fly aboard the doomed Columbia mission in 2003 (STS-107), but later opted out of the mission. Jean-Jacques Favier was deputy director for space technology and deputy director for advanced concepts and strategy at CNES, director of the Solidification Laboratory at the French Atomic Energy Commission and research program director at the International Space University.

Alain Lipietz (born September 19, 1947 as Alain Guy Lipiec) is a French engineer, economist and politician, a former Member of the European Parliament, and a member of the French Green Party. He has, however, been suspended from the party since 25 March 2014 and is an elected local politician in Val de Bièvre, Paris, France.