Size-dependent plasticity and two centuries of Darwin

Ward et al in the recent PNAS:

The model suggests that dislocation–dislocation interactions dominate at larger scales, whereas the behavior at the smallest MD scales is controlled by nucleation over energy barriers. These results provide a basic framework for understanding and predicting size-dependent plasticity in nanoscale asperities under contact conditions in realistic engineered surfaces.

Some very interesting papers on Darwin from the Two Centuries of Darwin Sackler Colloquium — examples: Daniel Dennett on Darwin’s “strange inversion of reasoning”, Robert J Richards on Darwin’s place in the history of thought: A reevaluation, Elliott Sober on Did Darwin write the Origin backwards? , and Francisco J Ayala on Darwin and the scientific method. Have fun!

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