Diagramming Evolution: The Case of Darwin's Trees.

Area of Science:

• * History of Science
• * Evolutionary Biology
• * Scientific Visualization

Background:

• * Charles Darwin extensively used diagrams, particularly trees, throughout his scientific career.
• * Diagrams were integral to the development of his evolutionary theories.
• * This study examines Darwin's trees from early notebooks to published works.

Purpose of the Study:

• * To analyze the role of diagramming in Charles Darwin's scientific practice.
• * To explore how Darwin used tree diagrams to represent and investigate evolutionary ideas.
• * To understand the epistemic function of Darwin's diagrams in scientific discovery.

Main Methods:

• * Examination of Darwin's tree diagrams from various stages of his work.
• * Analysis of the interplay between observable patterns and conjectural narratives within the diagrams.
• * Interpretation of the diagrams as tools for scientific inquiry and communication.

Main Results:

• * Darwin's diagrams simultaneously depicted natural patterns and hypothetical evolutionary narratives.
• * These diagrams necessitated dynamic reader engagement to understand the disclosed connections.
• * The narratives were conjectural and probabilistic, used to make general claims about nature's workings.

Conclusions:

• * Darwin's diagrams were not passive representations but active tools for scientific reasoning.
• * The epistemic work of his diagrams stemmed from the dynamic interplay of patterns and conjectural narratives.
• * Diagramming was a crucial method for Darwin to explore and articulate evolutionary theory.