Cordani is emeritus professor, Institute of Geosciences, University of São Paulo (USP), Brazil. He was trained in geochronology at UC Berkeley (1963) under the guidance of John Reynolds, and obtained his DSc (USP) in 1968. In the 60’s he established a geochronological laboratory that gained international recognition. At the USP he was director of the Institute of Geosciences (1987-1991) and Institute of Advanced Studies (1994-1997). He was president of the International Union of Geological Sciences (1988-1992) and the 31st International Geological Congress (Rio de Janeiro, 2000). He has published ca. 280 scientific articles, and received many awards, among which the Great Cross of Scientific Merit (Brazil), the José Bonifacio Gold Medal (Brazilian Geological Society), and the TWAS medal lecture. He is member of the academies of science of Brazil, Argentina, France and Portugal.