darwin

Unit of evolutionary change

Instance of: unit of measurement

Overview

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The darwin (d) is a unit of evolutionary change, defined by J. B. S. Haldane in 1949. One darwin is defined to be an e-fold change in a trait over one million years. Haldane named the unit after Charles Darwin.

Overview

All data

9 statements · 11% with external sources · numbers in brackets are citations

Named after: Charles Darwin
Unit symbol: d
d
Discovered: 1949
Discovered by: J.B.S. Haldane
Conversion to standard unit: 1 reciprocal megaannum

On other databases

2 identifiers linking darwin across the web's reference databases

Freebase ID/m/0d2s8d
Wolfram Language unit code"EvolutionDarwins"

Data quality

statements

11%

externally sourced

Source last edited October 1, 2026. AIDb refreshes this page daily.

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AIDb. (2026). darwin (Q1166886). Retrieved from https://aidb.si/e/darwin-Q1166886