Cecily Darwin Littleton (15 November 1926 – 14 April 2022) was a Scottish X-ray crystallographer and horticulturalist.
She worked alongside Dorothy Hodgkin on the identification of the crystal structure of biomolecules.
[1] Her father worked on atomic theory and X-ray diffraction, and was a member of the Darwin–Wedgwood family.
Littleton moved to Philadelphia and worked alongside Arthur Lindo Patterson at the Fox Chase Cancer Center.
[7] In 1989, she donated a chair belonging to Charles Darwin to the Academy of Natural Sciences of Drexel University.