Best Known As: Business Person

Career Facts:  * University of California, Berkeley: assistant professor, 1962-64

* University of Sheffield: lecturer in physics, 1964-74, senior lecturer 1974-79, reader 1979-80, professor 1980-88

* Caltech: research associate, 1970-71

* University of Manchester: professor of isotope geochemistry, Department of Earth Sciences, 1988-

* Member of committees for SERC, the British National Space Centre and PPARC