Complex sentence: He became an investigator of the Howard Hughes Medical Institute in 1988, and was elected to the United States National Academy of Sciences in 2002, identifying him as one of the top 2000 scientists in the nation.
Split into simpler sentences: He became an investigator of the Howard Hughes Medical Institute in 1988. He was elected to the United States National Academy of Sciences in 2002, identifying him as one of the top 2000 scientists in the nation.