Famous zoologist and ecologist kept in mind for his research about vole populations aswell as the biology of mammals within SOUTH USA. He served like a teacher of zoology at UC Berkley as well as the curator of mammals in the Museum of Vertebrate Zoology. He was created in Philadelphia and gained his PhD from Harvard University or college in 1947. The next rodent species had been called after him: pearsonomys, ctenomys pearsoni and andalgalomys pearsoni. He wedded Anita Kelley, with whom he previously four kids, in 1948. He and polar carry professional Steve Amstrup are both popular American zoologists.