I explain how the Modern Synthesis led to our current understanding of evolution. I also discuss the current issues in evolution including epigenetics, horizontal gene transfer, and abiogenesis and the need for a unified theory of life. 

A continuation on the mechanisms of evolution with a focus on sexual selection. I also define, sexual reproduction, two sexes, sexual selection, and provide examples of sexual selection. 

I focus on the mechanisms of random evolution and how mutations and recombination not only cause evolution but are important sources of variation. 

In this podcast, I explain the different types of natural selection including directional selection, stabilizing selection, disruptive selection, balancing selection, and a brief introduction to sexual selection. 

I explain why defining species is difficult and describe four species concepts including morphological, biological, polyphasic, and phylogenetic species concept.