Descent of Man and Selection in Relation to Sex, Part 2, The by Charles Darwin (1809 - 1882)

XVII - Secondary Sexual Characters of Mammals Part 1

XVI - Birds - Concluded Part 4

این قسمت را گوش کنید XVII - Secondary Sexual Characters of Mammals Part 1 از  Descent of Man and Selection in Relation to Sex, Part 2, The by Charles Darwin (1809 - 1882) در CastVibes

XII - Secondary Sexual Characters of Fishes, Amphibians, and Reptiles Part 1

XVI - Birds - Concluded Part 1

XVI - Birds - Concluded Part 3

XII - Secondary Sexual Characters of Fishes, Amphibians, and Reptiles Part 2

XIII - Secondary Sexual Characters of Birds Part 2