Educação Superior::Ciências Biológicas::EcologiaEducação Superior::Ciências Biológicas::Biologia GeralPresents a lecture of Professor Stephen C. Stearns that speaks about speciation. Speciation is the process through which species diverge from each other and/or from a common ancestor. There are several definitions of species, most of which focus on reproductive isolation and/or phylogenetic similarities. This can cause some controversy. Speciation can result from geographical separation or ecological specialization