File:Darwin Tree 1837.png
From WikiMD's WELLNESSPEDIA
Size of this preview: 368 × 600 pixels. Other resolution: 1,390 × 2,265 pixels.
Original file (1,390 × 2,265 pixels, file size: 4.22 MB, MIME type: image/png)
Summary[edit]
| Summary | |
|---|---|
| Description | Sketch from Charles Darwin's Notebooks on Transmutation of Species (1837), arguably the first example of a phylogenetic tree. (1) represents a common ancestor, the barred branches represent extant descendants, and the unmarked branches represent extinct descendants. The notes read: I think[sketch]Case must be that one generation then should be as many living as now. To do this & to have many species in same genus (as is) requires extinction.Thus between A & B immense gap of relation, C & B the finest gradation, B & D rather greater distinction. Thus genera would be formed – bearing relation [page break] to ancient types – with several extinct forms[.] |
| Source | Wikimedia Commons file page |
| Author | Charles Darwin |
| Permission | See original Commons license details. |
Licensing[edit]
Public Domain
This file is in the public domain and may be used without restriction.
Please see the linked source page for the original file history, attribution information, and licensing details.
Original attribution and file history: Wikimedia Commons
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:36, 5 June 2026 | | 1,390 × 2,265 (4.22 MB) | Maintenance script (talk | contribs) | == Summary == Importing file |
You cannot overwrite this file.
File usage
The following file is a duplicate of this file (more details):
- File:Darwin Tree 1837.png from Wikimedia Commons
The following 2 pages use this file:
