A new kind of science by Stephen Wolfram in 2002
9.1 The problems of physics
9.2 The notion of reversibility
9.3 Irreversibility and the second law of thermodynamics
9.4 Conserved quantities and continuum phenomena
9.5 Ultimate models for the universe
9.6 The nature of space
9.7 Space as a network
9.8 The relationship of space and time
9.9 Time and causal networks
9.10 The sequencing of events in the universe
9.11 Uniqueness and branching in time
9.12 Evolution of networks
9.13 Space, time and relativity
9.14 Elementary particles
9.15 The phenomenon of gravity
9.16 Quantum phenomena