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campbl26 - Early Earth and the Origin of Life We will...

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Early Earth and the Origin of Life We will concentrate in this lecture on two things: 1. An overview of the logic of the origin of life What is the history of life’s origins? How is it possible that life could form? Why doesn’t life arise de novo today? 2. An overview of the diversity of life Problems with the the Five-Kingdom system Attempts at dealing with these problems via an n -Kingdom system of organismal classification Carl Woese and the Universal tree
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Origin of Life (overview) Singularity: Pre-Big Bang Inflation: Energization of Big Bang Universal expansion: Energy provided by Inflation Sub-atomic particles: Energy Mass conversion as universe cooled Atoms: mostly Hydrogen Gas-cloud inhomogeneities: provided gravity wells Stars: gas-cloud gravitational collapse Super novae: Metals: Atoms other than H and He Molecules: More complex than H 2 Accretion: Formation of planets Planets: gravity wells (like stars but smaller)
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Synthesis of Lighter Elements
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campbl26 - Early Earth and the Origin of Life We will...

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