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Darwin's notebook

Darwin's notebook by ConserVentures
Darwin's notebook, a photo by ConserVentures on Flickr.
This image of page 36 of one of Charles Darwin's 1837 journals gives us chills.

There is a tree with branches depicting a postulation on how related genera would be formed, main text reads:

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

But the most evocative part is the small note in the upper left:

I think

Darwin's notebooks are available online through You can open a notebook and browse the pages as though flipping through them in person.

In early June, the New York Times published a story on the Open Tree of Life Project, the goal of which is to draw "a tree of life that includes every known species. A tree, in other words, with about two million branches."

[Source:  New York Times, June 5, 2012 "Open Tree of Life Project ]

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