Mathematics Department, McGill University, Montreal, Canada. Director of CICMA (Centre Interuniversaire en Calcul Algebrique) and an associate member of the CRM (Centre de Recherches Mathématiques).
Founder of the Institute of Human Origins in Berkeley. Paleoanthropologist who has discovered in 1974 a 3.18 million year old hominid skeleton - popularly known as "Lucy" - in the Hadar region of Ethiopia. He also found the "First Family", a unique collection of 13 individuals who died in a single geological moment.
Professeur honoraire au Collège de France, Paris, France.