Complex sentence: In 1897, he received a Ph.D. from Stanford University and earned a M.D. from Johns Hopkins in 1902 and subsequently practiced medicine in San Francisco, while again serving as curator of the herpetological collections of the California Academy of Sciences.
Split into simpler sentences: In 1897, he received a Ph.D. from Stanford University and earned a M.D. from Johns Hopkins in 1902. Subsequently, he practiced medicine in San Francisco, while again serving as curator of the herpetological collections of the California Academy of Sciences.