Sometimes evolution proceeds much more rapidly than we might think. Genetic analysis makes it possible to detect the earliest stages of species formation and to gain a better understanding of speciation processes. For example, a study just published in PLOS Genetics by researchers from Eawag and the University of Bern — investigating rapid speciation in threespine stickleback in and around Lake Constance — shows that a species can begin to diverge very rapidly, even when the two daughter species breed alongside one another simultaneously.
Read more at: http://archaeologynewsnetwork.blogspot.com/2016/02/watching-new-species-evolve-in-real-time.html#.VtxBfeYt5eQ