thinhbkseea Posted May 30, 2014 Posted May 30, 2014 Earth's Story The Deep The deep the other world, where the temperature hovers just above zero but is occasionally pierced by jets of water boiling at 300ºC , revolutionized the way scientists think about this planet and filled in many of the missing elements in the unfolding detective story of the Earth's history. At the heart of the tale is the mid-Atlantic ridge a vast chain of submarine volcanoes stretching the length of the Atlantic Ocean and then on through the rest of the world's oceans a continuous mountain chain running for 60,000 kilometres. https://www.youtube.com/watch?v=nIJUVp5EJBQ Earth's Story Journey to the Center Of the Earth What drives the tectonic plates as they glide over the Earth's surface? Scientists have probed our planet to its core. In this realm of unimaginably high temperatures and pressures, matter takes on new forms, and solid rock can behave like a fluid. As vast masses of rock flow slowly within the Earth, so the surface moves and changes. Gigantic plumes of hot material can well up from the depths, triggering huge volcanic eruptions and causing the crust to bulge and break. The result may be the splitting of a continent and the creation of a new ocean basin Earth's Story Time Travellers How old is the planet and what was it like when it first formed? Geologists have been striving to find the answer to this question for the last 200 years. Using computer graphics, travel back nearly four billion years, to re-create the landscape of that distant time, when the planet was covered with a single vast but shallow ocean, dotted with thousands of volcanic islands, and bombarded by meteorites. Astonishingly, life was already flourishing. The oldest-known object in existence may look like any old lump of rock but it is 4,566 million years old and may provide a vital clue to the age of the Earth. Host Aubrey Manning. Earth's Future Scientists are tracking the overall rate of ice loss with the Grace Satellite. They found that from 2003 to 2009, Greenland lost about a trillion tons, mostly along its coastlines. This number mirror's ice loss in the Arctic as a whole. By 2012, summer sea ice coverage had fallen to a little more than half of what it was in the year 1980. While the ice rebounded in 2013, the coverage was still well below the average of the last three decades. Analyzing global data from Grace, one study reports that Earth lost about 4,000 cubic kilometers of ice in the decade leading up to 2012. https://www.youtube.com/watch?v=8PeJ3pmHOYA -1
imatfaal Posted May 30, 2014 Posted May 30, 2014 ! Moderator Note thinhbkseea We are not great fans of posting other people's videos (especially over an hour's worth) unless required by the debate - as the opening post of a thread it is definitely frowned upon. Secondly, you do not seem to be opening a discussion - just making a series of statements. We regard this as preaching and again we prefer that members do not do this. This text seems to be a slightly altered version of this commentary from the creators of the video. I am going to close the thread. Do not respond to this modnote and derail the thread. You can report this post if you feel it is unfair - but first I would recommend you reread the rules you agreed to upon sign up Stop this form of posting
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