Members of the United States National Academy of Sciences

Robert Lewis Letsinger (July 31, 1921 – May 26, 2014) was an American biochemist and was a professor of chemistry at Northwestern University. He was best known for his research and development of chemical synthesis of DNA.

James Freeman Gilbert (August 9, 1931 – August 15, 2014) was an American geophysicist, best known for his work with George E. Backus on inverting geophysical data, and also for his role in establishing an international network of long-period seismometers.Gilbert was born in Vincennes, Indiana. A 1949 graduate of Lawrenceburg High School (Kentucky), his undergraduate and graduate degrees were earned from MIT (B.S., 1953, and Ph.D. in geophysics, 1956), and he continued at MIT as a postdoctoral fellow until 1957, when he moved to the University of California, Los Angeles. At UCLA he was an assistant, then associate, professor, but left to take an appointment as
a senior researcher at Texas Instruments. In 1961, he was recruited by Walter Munk to the Institute of Geophysics and
Planetary Physics (IGPP) at the Scripps Institution of Oceanography, also becoming a professor of geophysics at the University of California, San Diego. He remained at UCSD through the remainder of his career, and became an emeritus professor.In his later years, Gilbert enjoyed extensive world travel with his wife, Sally Gilbert. He died due to complications resulting from a car accident in Southern Oregon on August 15, 2014. He was 83 years old.

Alexei Vladimir "Alex" Filippenko (; born July 25, 1958) is an American astrophysicist and professor of astronomy at the University of California, Berkeley. Filippenko graduated from Dos Pueblos High School in Goleta, California. He received a Bachelor of Arts in physics from the University of California, Santa Barbara in 1979 and a Ph.D. in astronomy from the California Institute of Technology in 1984, where he was a Hertz Foundation Fellow. He was a postdoctoral Miller Fellow at Berkeley from 1984 to 1986 and was appointed to Berkeley's faculty in 1986. In 1996 and 2005, he a Miller Research Professor, and he is currently a Senior Miller Fellow. His research focuses on supernovae and active galaxies at optical, ultraviolet, and near-infrared wavelengths, as well as on black holes, gamma-ray bursts, and the expansion of the Universe.

Dr. Clyde Allen Hutchison Jr. (May 5, 1913 – August 29, 2005) was an American chemist notable for his research in magnetic resonance spectroscopy.

Hutchison was a member of the National Academy of Sciences and
a chairman and professor of the department of chemistry at the University of Chicago.
He was also a fellow of the American Academy of Arts and Sciences,
a fellow of the American Physical Society,
a member of the American Chemical Society,Guggenheim fellow at Oxford University,
the George Eastman Professor at Oxford University,
and a member of the American Association for the Advancement of Science.
He was also a recipient of the Peter Debye Award in Physical Chemistry from the American Chemical Society. He served as editor of the Journal of Chemical Physics from 1953 - 1955 and again from 1958 - 1959.
Hutchison participated in the Manhattan Project.
The University of Chicago said that Hutchison "pioneered research in magnetic resonance spectroscopy".

Arie Jan Haagen-Smit (December 22, 1900 – March 17, 1977) was a Dutch chemist. He is best known for linking the smog in Southern California to automobiles and is therefore known by many as the "father" of air pollution control. After serving as an original board member of the Motor Vehicle Pollution Control Board, formed in 1960 to combat the smog, Dr. Haagen-Smit became the California Air Resources Board's first chairman in 1968. Shortly before his death in Pasadena, California, of lung cancer, the Air Resources Board's El Monte Laboratory was named after him.

Robert McCormick Adams Jr. (July 23, 1926 – January 27, 2018) was an American anthropologist and secretary of the Smithsonian Institution (1984–94). He worked in both the Near East and Mesoamerica. A long time professor of the University of Chicago, he was best known for his research in Iraq.

Jacques Loeb (; German: [løːp]; April 7, 1859 – February 11, 1924) was a German-born American physiologist and biologist.

Robley Cook Williams (October 13, 1908 – January 3, 1995) was an early biophysicist and virologist. He served as the first president of the Biophysical Society.

Nevin Stewart Scrimshaw (January 20, 1918 – February 8, 2013) was an American food scientist and Institute Professor emeritus at the Massachusetts Institute of Technology. Scrimshaw was born in Milwaukee, Wisconsin. During the course of his long career he developed nutritional supplements for alleviating protein, iodine, and iron deficiencies in the developing world. His pioneering and extensive publications in the area of human nutrition and food science include over 20 books and monographs and hundreds of scholarly articles. Scrimshaw also founded the Department of Nutrition and Food Science at the Massachusetts Institute of Technology, the Institute of Nutrition of Central America and Panama, and the Nevin Scrimshaw International Nutrition Foundation. He was awarded the Bolton L. Corson Medal in 1976 and the World Food Prize in 1991. Scrimshaw spent the last years of his life on a farm in Thornton, New Hampshire, where he died at 95.

Theodore Thomas Puck (September 24, 1916 – November 6, 2005) was an American geneticist born in Chicago, Illinois. He attended Chicago public schools and obtained his bachelors, masters, and doctoral degree from the University of Chicago. His PhD work was on the laws governing the impact of an electron upon an atom and his doctoral adviser was James Franck. During WW II Puck stayed at the University of Chicago. There he worked in the laboratory of Oswald H. Robertson on the study of how bacteria and viruses can spread through the air and on dust particles. After a postdoc position in the laboratory of Renato Dulbecco, Puck was recruited in 1948 to establish and chair the University of Colorado Medical School's department of biophysics. He retired from the University of Colorado Medical School in 1995 as professor emeritus, but continued to do laboratory work there until a few weeks before his death.Puck was an early pioneer of "somatic cell genetics" and single-cell plating ( i.e. "cloning" .) This work allowed the genetics of human and other mammalian cells to be studied in detail. Puck's key work ultimately made modern genetics, such as the human genome and other mammalian genome projects, possible. Dr. Puck with the assistance of Philip I. Marcus, successfully cloned a HeLa cell in 1955.
Puck made many basic discoveries in several areas. Confirming research done in 1956 by Joe Hin Tjio, Puck's team found that humans had 46 chromosomes rather than 48 which had earlier been believed. He developed the CHO cell line from Chinese hamster ovarian cells for this work and contributed to deeper insights into chromosomes and genetics of mammalian cells. Derived CHO cell lines became the most productive manufacturing approach for therapeutic proteins, resulting in hundreds of highly efficient drugs. Puck studied X-rays and cellular mutations. He also isolated and studied cellular mutations.
Puck has won a number of honors for his work most notably the Albert Lasker Award for Basic Medical Research in 1958. In 1973 he was awarded the Louisa Gross Horwitz Prize from Columbia University together with Renato Dulbecco and Harry Eagle. Dulbecco won the Nobel Prize in medicine in 1975. Puck also founded the Eleanor Roosevelt Institute at the University of Denver, where he was an emeritus professor. A member of the National Academy of Sciences since 1960, Puck published more than 200 papers on topics including Alzheimer's disease and Down syndrome, and optimising radiotherapy dosages for the treatment of cancer.
He died following complications from a broken hip. Upon his death he was survived by his widow, three daughters, and seven grandchildren.