"Evolutionary rate at the molecular level" (1968) Nature: 217 pp 624-626
Reproduced by permission of Macmillan Magazines Ltd.
One of the Kimura's original two bombshells. New molecular evidence had become available in the 1960s, and Kimura argued it had features that were inexplicable by natural selection and better explained by a theory of neutral drift. (See also King & Jukes' paper in this collection).