Complex sentence: He obtained his bachelor's degree in physics from Harvard University in 1943, his master's in 1946 and Ph.D. in 1949, and taught a course in the history of science there from 1948 until 1956 at the suggestion of Harvard president James Conant.
Split into simpler sentences: He obtained his bachelor's degree in physics from Harvard University in 1943, and master's and Ph.D in 1946 and 1949, respectively. He later taught a course in the history of science at Harvard from 1948 until 1956 at the suggestion of university president James Conant.