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Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
1. How can one species turn into another? One species does not turn into another or several other species -- not in an instant, anyway. The evolutionary process of speciation is how one population of a species changes over time to the point where that population is distinct and can no longer interbreed with the parent population. In order for one population to diverge enough from another to become a new species, there needs to be something to keep the populations from mixing.