{"product_id":"explore-alliance-presents-how-do-you-know-episode-21-the-origin-of-life","title":"Explore Alliance Presents: How Do You KNOW? – Episode #21: 'The Origin of Life'","description":"\u003cdiv class=\"page\" title=\"Page 1\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cdiv title=\"Page 1\" class=\"page\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cp\u003e\u003cspan\u003eRussian biologist A. P. Oparin and Scottish biologist J. B. S. Haldane both proposed an early \u003c\/span\u003e\u003cspan\u003ereducing atmosphere \u003c\/span\u003e\u003cspan\u003eon Earth consisting of hydrogen rich molecules such as hydrogen gas, methane, ammonia, along with nitrogen, carbon dioxide, and water vapor. The scientists suspected that these gases were either left over from the solar nebula or belched into the atmosphere from geologic\/volcanic processes. Ultra violet light from the early Sun and electrical \u003c\/span\u003e\u003cspan\u003eactivity (lightning) would ‘cook’ such an atmosphere into a rich brew of energy \u003c\/span\u003e\u003cspan\u003erich biochemicals including amino acids and other compounds.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOparian and Haldane also hypothesized \u003c\/span\u003e\u003cspan\u003ethat the earliest lifeforms would have been \u003c\/span\u003e\u003cspan\u003eanaerobic \u003c\/span\u003e\u003cspan\u003ecells, living on available biochemicals in the shallow waters in the seas and perhaps in the soils. Anaerobic organisms do not need sunlight, nor do they need oxygen, in fact they do not need atmosphere at all. \u003c\/span\u003e\u003cspan\u003eAnaerobic bacteria exist today and include among their number species that live miles \u003c\/span\u003e\u003cspan\u003ebelow the Earth’s surface as well as at the bottom of the sea near or in \u003c\/span\u003e\u003cspan\u003ehydrothermal vents. Some of these organisms have not seen sunlight or free atmosphere for billions of years. Which leads astrobiologists to explore extreme environments on Earth in order to gain a deeper understanding of how life may take root on other worlds.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn this episode of 'How Do You KNOW?' Dr. Barth examines the origins and extremes of life as we know it, why we are searching for life on Mars and other worlds, and why once a planet holds life, that \u003c\/span\u003esterilizing that planet by any means short of a stellar catastrophe is virtually impossible.\u003c\/p\u003e\n\u003cp\u003eDownload the free study guide 'The Origin of Life' and get the free e-book '\u003ca title=\"Astronomy For Educators\" href=\"https:\/\/scholarworks.uark.edu\/oer\/2\/\" target=\"_blank\"\u003eAstronomy For Educators\u003c\/a\u003e' to learn more.  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/explorescientificusa.com\/pages\/explore-alliance-presents-how-do-you-know-with-dr-daniel-barth\" title=\"How Do You KNOW? Index of Programs\"\u003eReturn to the How Do You KNOW? index of programs\u003c\/a\u003e. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv title=\"Page 1\" class=\"page\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":46518263152780,"sku":"sku-40306445090988","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/5858\/0876\/files\/HowDoYouKnow_COLORcopy_36b7fd0b-24f8-4c33-8fd1-920889fe1a15.png?v=1772695482","url":"https:\/\/gobekusa.com\/products\/explore-alliance-presents-how-do-you-know-episode-21-the-origin-of-life","provider":"GobekUSA","version":"1.0","type":"link"}