I was born in Atlanta, Georgia, and got my PhD in mathematics from the University of Warwick in England where I was a Marshall Scholar. I have been on the faculties at Princeton and Oxford, as well as Berkeley. I have been a visiting professor at Yale, the Institute for Advanced Study in Princeton, the Mathematical Sciences Research Institute in Berkeley, and the Newton Institute in Cambridge, England. My research interests include calculus on fractals and I am currently studying applications of this theory to soap film modeling and discrete calculus.