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Natural Selection and CAs. Bao-Hoi Nguyen CS240 Spring 2003. Overview. Introduction Wolfram vs. Darwin Optimal The Leopard has an Internal CA Evidence Against Natural Selection Conclusion. Introduction. Lots of complexity and diversity seen in nature. Need an explanation

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natural selection and cas

Natural Selection and CAs

Bao-Hoi Nguyen

CS240 Spring 2003

overview
Overview
  • Introduction
  • Wolfram vs. Darwin
  • Optimal
  • The Leopard has an Internal CA
  • Evidence Against Natural Selection
  • Conclusion
introduction
Introduction
  • Lots of complexity and diversity seen in nature. Need an explanation
  • Darwin: Origin of Species
  • Wolfram: CAs
wolfram vs darwin
Wolfram vs. Darwin
  • To many parts
  • Interbreeding
  • Finches
optimal
Optimal
  • Definition
  • Some animals have advantages
  • Wolfram’s explanation
  • Why only human?
the leopard has an internal ca
The Leopard has an Internal CA
  • Animal
  • SeaShells
  • Plant
animals
Animals
  • Pattern looks complex
  • Same patterns seen on all animals
  • 2D CAs easily reproduce
seashell
Seashell
  • Patterns
  • Shapes
  • 1D CA
plants
Plants
  • Leaf and tree shapes
  • Fibonacci numbers
  • Golden angle
evidence against natural selection
Evidence Against Natural Selection
  • The neck of the giraffe
  • The first cell
conclusion
Conclusion
  • Natural selection is questionable
  • Wolfram’s theory is legitimate