The spectacular radiation of 2,000 species of cichlid fishes in East Africa is an ideal model system and natural laboratory for studying evolutionary processes. The explosive speciation of cichlids is ...

The striking differences in both species richness and morphological diversity that exist between major groups of organisms constitute a ubiquitous yet unexplained pattern in the large-scale ...

Contrary to what many people think, two species can hybridize naturally in the wild to give rise to a third species, a finding that fundamentally alters our understanding of the evolution of species ...

** I expect you to read: Avise, J.C. 2004. Chapter 7: Speciation and hybridization. In Molecular Markers, Natural History and Evolution (2nd edn.). Chapman and Hall, New York. Having at least briefly ...

Natural selection commonly drives the origin of species, as Darwin initially claimed. Mechanisms of speciation by selection fall into two broad categories: ecological and mutation-order. Under ...

A good way to start an argument among biologists is to ask them what seems a simple question: "What is a species?" To evolutionary theorists, a species is a fundamental unit, and transitions between ...

Matías Gómez-Corrales, a recent biological sciences Ph.D. graduate from the University of Rhode Island, and his advisor, Associate Professor Carlos Prada, have published a paper in Nature ...

Spatial isolation is known to promote speciation -- but researchers have now shown that, at least in yeast, the opposite is also true. New ecological variants can also evolve within thoroughly mixed ...

The evolution of a new species can occur rapidly enough for them to observe the process in a simple laboratory flask, biologists have discovered. In a month-long experiment using a virus harmless to ...

"A new species develops if a population which has become geographically isolated from its parental species acquires during this period of isolation characters which promote or guarantee reproductive ...

The shifting songs of Darwin's finches have given new insight into processes that shape the course of evolution, preventing newly forked branches on life's tree from growing back together. The birds ...

Matías Gómez-Corrales, a recent biological sciences Ph.D. graduate from the University of Rhode Island, and his advisor, Associate Professor Carlos Prada, have published a paper in Nature ...