Darwin notes

H.M.S. Beagle

Darwin's next 22 years

His two Major Theses

  1. Descent with modification:
    1. "...all species, living and extinct, have descended, without interruption, from one or a few original forms of life." 1
    2. This is quite different from the biblical fixed species or Lamarck's transformational theory.
  2. Natural Selection


  1. Fuytuyma, Douglas J. (2005) Evolution. MA: Sinauer Assoc.