 
      "I
              think": Descent with Modification
        
The first
          phylogenetic tree, from Darwin's notebook of 1836. This
          notebook, along with the diagram, was in 2021 reported stolen
          from its library, possibly as long as 20 years ago. Theories
          of the "Mad Collector" abound.
        
HOMEWORK:
          Redraw Darwin's tree in modern format, noting in particular
          the living status of species A, B, C, & D.
        
All text material ©
            2021 by Steven M. Carr