El aire que respiramos tiene un 21% de ox\u00edgeno, una cantidad mayor que en cualquier otro mundo conocido. Aunque podemos dar por sentado nuestro aire, la Tierra no fue siempre un planeta oxigenado. \u00bfC\u00f3mo se volvi\u00f3 as\u00ed?Ox\u00edgeno es la narraci\u00f3n m\u00e1s actualizada de la historia del ox\u00edgeno atmosf\u00e9rico en la Tierra. Donald E. Canfield \u2014una de las principales autoridades en geoqu\u00edmica, historia de la Tierra y los oc\u00e9anos primitivos\u2014 recorre esta vasta historia, poniendo el \u00e9nfasis en su relaci\u00f3n con la evoluci\u00f3n de la vida y la qu\u00edmica cambiante de la Tierra. Con una narrativa en primera persona accesible y colorista, bebe de multitud de disciplinas, como la geolog\u00eda, la paleontolog\u00eda, la geoqu\u00edmica, la bioqu\u00edmica, la fisiolog\u00eda animal y la microbiolog\u00eda, para explicar por qu\u00e9 nuestro planeta oxigenado se volvi\u00f3 el lugar ideal para la vida. Al describir qu\u00e9 procesos, tanto biol\u00f3gicos como geol\u00f3gicos, act\u00faan para controlar los niveles de ox\u00edgeno en la atm\u00f3sfera, el autor rastrea a trav\u00e9s del tiempo los registros de la concentraci\u00f3n de ox\u00edgeno. El lector aprende acerca del \u00abgran suceso de oxidaci\u00f3n\u00bb, el punto de inflexi\u00f3n en que, hace 2300 millones de a\u00f1os, el contenido de ox\u00edgeno de la Tierra se increment\u00f3 radicalmente, y Canfield examina c\u00f3mo la oxigenaci\u00f3n cre\u00f3 un entorno favorable para la evoluci\u00f3n de los animales.El autor gu\u00eda a los lectores por las diversas l\u00edneas de evidencia cient\u00edfica, considera algunas de las v\u00edas err\u00f3neas y callejones sin salida que han surgido en el camino, y destaca a los cient\u00edficos que han hecho los descubrimientos clave en el campo. Mostrando c\u00f3mo la atm\u00f3sfera de la Tierra se ha desarrollado en el tiempo, Ox\u00edgeno conduce a los lectores en un viaje extraordinario por la historia de la oxigenaci\u00f3n de nuestro planeta.<\/p>\n","protected":false},"excerpt":{"rendered":"
Donald E. Canfield<\/p>\n","protected":false},"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[23],"product_cat":[15730,5808,5807,5806],"product_tag":[5925],"class_list":["post-32662","product","type-product","status-publish","product_brand-epub-paradise","product_cat-donald-e-canfield","product_cat-ebooks","product_cat-epub","product_cat-espanol","product_tag-ciencias-naturales","desktop-align-center","tablet-align-left","mobile-align-center","first","instock","taxable","shipping-taxable","purchasable","product-type-variable"],"yoast_head":"\n