This is another video about Natural selection it talks about descent with modification and common descent . Common descent is the idea of all orginating from one common ancestor. It also talks about descent with modification which is a parent has children with a child which is always different than the parent.
This shows and explains the exellent process on how evolution happens. Natural Selection/ survial on the fittest in an entertaining way by the same guy as Evidence of Evolution. This also tells about the industrial revelution affecting moth populations.