Darwin (unit)

The darwin is a unit of measurement used to indicate the rate of evolutionary change, named after the naturalist Charles Darwin. It expresses the amount of change in a trait or characteristic of a population over time. The darwin is typically defined in terms of the fractional change in a trait per generation. A change of 1 darwin means that a trait has changed by a factor of e (approximately 2.718) over a specific time period, such as one generation.