ABSTRACT
Cycles on an Early Mars ...................................................................................................... 281 18.16 Robustness and Diversity of Explorations through Chemical Phase Space ........................284 Acknowledgments ..........................................................................................................................285 References ......................................................................................................................................286
Origin problems are the most conjectural and qualitative of scientic questions. It is hardly surprising then that the origin of life, like the origin of the universe, lacks uniquely dening quantitative assumptions and initial conditions. Individually, they are Fermi questions of a functional sort, requiring the use of a rst-principles conceptual approach to a situation of fundamental quantitative ignorance. Indeed, concepts useful in the exploration of one question signicantly help our investigation of the other: this is true for underlying the cosmochemistry of life is a cosmophysics hinting at congruences of symmetry-breaking problems in both the origin of the universe and the origin of life. But where theorists such as Lee Smolin have sought to apply the ideas and concepts
