Bachelor with highest honors, Lehigh University, 1973. Master of Arts, Harvard University, 1974. Doctor of Philosophy, Harvard University, 1977.
Doctor of Philosophy (honorary), Uppsala University, Sweden, 1996. Doctor of Science (honorary), Lehigh University, 1998.
Assistant professor geology Oberlin College, Ohio,1977-1982. Associate professor Harvard University, Cambridge, Massachusetts, 1982-1985, professor biology, 1985, curator botanical museum, 1985, professor earth and planetary science, 1985, department chairman organismic and evolutionary biology, 1992-1998. Member commission on planetary biology United States Space Science Board, 1982-1988, National Research Council Board on Earth Sciences, 1987-1988, 92-95, space studies board, 1989-1990, 97.
Board directors United States National Museum National History, 1993-1997.
Associate editor Paleobiology,1980-1992, Precambrian Research, 1985, Trends in Ecology and Evolution, 1987-1992, Review of Palaeobotany and Palynology, 1987, American Journal Science, 1990, Geology, 1992-1998, Palaios, 1996, Palaeography Palacoclimatology Palaeocology, 1997, International Journal Plant Sciences, 1998. Visiting fellow Gonville and Caius College, Cambridge, England, 1991-1992.
Contributor numerous articles, chapters to professional publications National Science Foundation grantee, 1980. Fellow Geological Society American, Linnean Society, London, American Academy Arts and Sciences, 1987, Guggenheim, 1987, American Association Advisory Science.
Recipient Walcott medal National Academy Sciences, 1987.
Board directors United States National Museum National History, 1993-1997. Fellow American Association for the Advancement of Science, European Union Geophysical Society (honorary). Member National Academy of Sciences, Botanical Society of America, American Philosophical Society, Paleontological Society (Schuchert award 1987, medal, 2005), American Academy Microbiology, Phi Beta Kappa (book award in science 2003), Sigma Xi.
Married Marsha Craig, June 22, 1974. Children: Kirsten C., Robert A. Bachelor with highest honors, Lehigh University, 1973.