New species can develop in as little as two generations, Galapagos study finds — ScienceDaily
▻https://www.sciencedaily.com/releases/2017/11/171124084320.htm
Researchers previously assumed that the formation of a new species takes a very long time, but in the Big Bird lineage it happened in just two generations, according to observations made by the Grants in the field in combination with the genetic studies.
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It is likely that new lineages like the Big Birds have originated many times during the #evolution of Darwin’s finches, according to the authors. The majority of these lineages have gone extinct but some may have led to the evolution of contemporary species. “We have no indication about the long-term survival of the Big Bird lineage, but it has the potential to become a success, and it provides a beautiful example of one way in which speciation occurs,” said Andersson. “Charles #Darwin would have been excited to read this paper.”