[4][5] Sampson is notable for his work on the carnivorous theropod dinosaurs Majungasaurus and Masiakasaurus and his extensive research into the Late Cretaceous Period, particularly in Madagascar.
[12][13] Aside from his research conducted in museums, Sampson has undertaken paleontological fieldwork in countries such as Zimbabwe, South Africa and Madagascar as well as the United States and Canada.
[14][15][16][17][18] In 1995 he made a phylogenetic analysis of the Centrosaurinae and Ceratopsidae in the state of Montana and produced two papers on these horned dinosaurs of the Late Cretaceous.
[14] Sampson stresses the importance of evolution in understanding the dynamics of ecology in everyday life and that is underplayed in modern society: "The web of life is composed of two distinctly different kinds of threads‹those that link organisms at any given moment in time through the flow of energy (ecology), and those that link all lifeforms through deep time via genetic information and shared common ancestry (evolution).
Without evolution, our vision is severely limited to the present day and we cannot begin to fathom the blossoming of life's diversity from single-celled forebears.
United in a single theme, evolution and ecology provide a powerful lens through which to view life's web, forming the foundation of an integrated and underutilized perspective on nature.
"[10]Below is a list of taxa that Sampson has contributed to naming: He has two daughters and resides in the San Francisco Bay Area with his wife Toni.