Some 50 million years later, near the end of the Permian period, volcanic activity would burn the carbonaceous matter, releasing carbon dioxide and acidic components, creating a sudden greenhouse gas effect that warmed the oceans and released methane from the ocean beds, all leading towards the Permian–Triassic extinction event, killing 90% of the species on Earth. Tyson starts by explaining that the lignin-rich trees evolved in the Carboniferous period about 300 million years ago, were not edible by species at the time and would instead fall over and become carbon-rich coal. This episode explores the palaeogeography of Earth over millions of years, and its impact on the development of life on the planet. Episode summary A map of Earth's plate tectonics The episode received a 1.6/5 in the 18-49 rating/share, with 4.08 million American viewers watching on Fox. The episode explores the history of the Earth starting with the period of the Late Heavy Bombardment, approximately "3.8 to 4.1 billion years ago during which the Moon, Mercury, Venus, and the Earth were battered by space debris." Host Neil deGrasse Tyson then delves into the biography of the Earth, expressed "in its continents, oceans and life living on and in them, saying 'the past is another planet,'" alluding to how plate tectonics have shaped the Earth over millions of years. The episode was directed by Brannon Braga, written by Ann Druyan and Steven Soter, and featured the voice of Amanda Seyfried as geologist Marie Tharp. It premiered on on Fox, and aired on on National Geographic Channel.
#Cosmos a spacetime odyssey season 2 series#
" The Lost Worlds of Planet Earth" is the ninth episode of the American documentary television series Cosmos: A Spacetime Odyssey. 9th episode of the 1st season of Cosmos: A Spacetime Odyssey " The Lost Worlds of Planet Earth"
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