#18 Eric Smith: The Origin and Nature of Life on Earth

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Dr. Eric Smith received the Bachelor of Science in Physics and Mathematics from the California Institute of Technology in 1987, and a Ph.D. in Physics from The University of Texas at Austin in 1993. He is External Professor at the Santa Fe Institute, Research Professor at George Mason University, and Principal Investigator at the Earth-Life Science Institute, Tokyo Institute of Technology. He is a physicist specializing in the origin of life, non-equilibrium systems, economics, and the evolution of human languages.

Here, we go through the main content of his 2016 book, The Origin and Nature of Life on Earth; the history of the RNA-first world, and the metabolism-first world; the continuity between geochemistry and biochemistry; the biosphere as the 4th geosphere; the role of hydrothermal vents in the rise of biochemistry; the citric acid cycle (Krebs cycle); a new analysis suggesting relations between the rise of macromolecules (particularly the RNA and proteins in the ribosome) and the elaboration and fixing of more complex metabolic pathways; and the need (or not) for extraplanetary sources of chemicals.

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O Dr. Eric Smith recebeu a licenciatura de Ciência em Física e Matemática pelo California Institute of Technology, em 1987, e um doutoramento em Física pela Universidade do Texas em 1993. É um professor externo no Santa Fe Institute, investigador na George Mason University, e investigador principal no Earth-Life Institute, do Tokyo Institute of Technology. É um físico especializado na origem da vida, sistemas de não-equilíbrio, economia, e evolução das línguas humanas.

Aqui, percorremos o conteúdo principal do seu livro de 2016, The Origin and Nature of Life on Earth; a história do “RNA-first world”, e do “metabolismo-first world; a continuidade entre geoquímica e bioquímica; a biosfera como quarta geosfera; o papel das fontes hidrotermais no surgimento da bioquímica; o ciclo do ácido cítrico (ciclo de Krebs); uma nova análise sugerindo relações entre o surgimento de macromoléculas (particularmente, RNA e proteínas no ribossoma) e a elaboração e fixação de mais complexas cascatas metabólicas; e a necessidade (ou não) de fontes extraplanetárias de químicos.

Faculty page at Tokyo Institute of Technology: http://www.elsi.jp/en/research/member/researcher/professor/Eric-Smith.html

Faculty page at Santa Fe Institute: https://www.santafe.edu/people/profile/d-eric-smith

Book The Origin and Nature of Life on Earth: https://www.amazon.com/Origin-Nature-Life-Earth-Emergence/dp/1107121884

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