For example, reproductive isolation is weak in the early stages of speciation, but changes to strong or complete in later stages of speciation (Figure 2). One or more of the many types of ...

Often this type of speciation occurs in three steps ... by "vicariance," geographical change that can be slow or rapid. An example of vicariance is the separation of marine creatures on either ...

Chimpanzees, for example, show population-specific signatures ... which is a necessary precursor to speciation. Future studies that incorporate ecological, behavioral, and genetic data hold ...

A recent classic on speciation returns to the Galapagos. Peter Grant and his wife Rosemary have long studied the evolution of Galapagos finches (Grant, 1986; see particularly Chapters 10, 11, 13; ...

But according to a study published this week in Nature, new species can arise arbitrarily and without provocation, challenging the widely held notion that physical isolation and selection are the ...

As long as the individuals in a population have the opportunity to interbreed and combine genes, they remain one species. A population of one species can only evolve into more than one species if ...