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B.Sc. University of Durham, U.K., Geology
Certificate of Proficiency- Foreign Visva-Bharati University, Bengali
Santiniketan, West Bengal, India.
Ph.D. University of Bristol, U.K., Geology
Visiting Lecturer [Assistant Professor] in Paleontology, Trinity College, University of Dublin, Ireland. 1989-1990.
NERC (NATO) Postdoctoral Research Fellowship, Queensland Museum, Brisbane, Australia. 1990-1992.
Smithsonian Postdoctoral Fellow, Washington, D.C. U.S.A. 1992-1993.
Assistant Curator, Cincinnati Museum Center, U.S.A. 1993-1997.
Adjunct Assistant Professor, University of Cincinnati, U.S.A. December 1993-1997.
Associate Curator, Cincinnati Museum Center, U.S.A. 1997.
Research Associate, Department of Paleobiology, Smithsonian Institution. U.S.A. 1994-present.
Associate Professor, University of California, Riverside. 1997-2003.
Professor, University of California, Riverside. 2003-