Francisco William da Cruz Junior is Professor at the Instituto de Geociências, Universidade de São Paulo. He obtained his BA in Geology from the Universidade Federal do Rio Grande do Norte (1995), his MA in Geology from the Universidade de São Paulo (1998) and a PhD in Chemistry from Universidade de São Paulo (2003). His major research interest is the investigation of palaeoclimate in tropical South America through the analysis of stable isotopes from speleothems.