Complex sentence: Ralph Keeling received a B.S. in physics from Yale University in 1979 and a Ph.D. in applied physics from Harvard University in 1988 for developing the first technique to accurately measure atmospheric oxygen.
Split into simpler sentences: Ralph Keeling received a B.S. in physics from Yale University in 1979. He received a Ph.D. in applied physics from Harvard University in 1988 for developing a novel technique for the accurate measurement of atmospheric oxygen.