Bachelor of Science, University Utrecht, The Netherlands, 1976. Master of Science, University Utrecht, 1978. Doctor of Philosophy, University Utrecht, 1983.
Assistant University Utrecht, 1979-1983. Maître-assistant University Geneva, Switzerland, 1984-1986. Docent University Hospital, Utrecht, 1986-1987.
Director Natural History Museum, Rotterdam, The Netherlands, since 1987. Freelance science journalist, since 1992.
Active D66 (Political Party), Hilversum and Rotterdam, 1980-1993. President Junior Chamber, Rotterdam, 1993. Member Swiss Society Zoology, Society Vertebrate Paleontology, American Society Mammalogists, Minibiological Research Foundation (secretary since 1988), Rotary (secretary since 1994).
Married Johanna Hendrika Maassen, August 16, 1979. Children: Barbara M., Coenraad J.