Geography

Hang Son Doong - Son Trach commune in Bo Trach district, Quang Binh province - is the largest natural caves in the world. This cave is located in the caves of Phong Nha-Ke Bang. Hang is part of the underground system connected to more than 150 different activities in Vietnam, located near the border with Laos. (www.youtube.com)

(HD) Earth Under Water in Next 20 Years - National Geographic Documentary

Imagine sea levels rising to over 70 metres... Eminent climatologists think another Great Flood is inevitable if current CO2 emissions continue. Based on research by NASA astro-biologist and paleontologist Professor Peter Ward and a group of respected American climatologists, Earth Under Water is an eye-opening documentary uses scientific evidence past and present, archive footage, location photography and CGI to explore the terrifying consequences should the atmosphere's CO2 levels treble over the next 100 to 300 years, as predicted.

Venture on an epic quest to discover the invisible forces and occurrences that sustain life on this planet and - for the first time - see these processes in action. (www.youtube.com)

Broadcast (1998) What drives the tectonic plates as they glide over the Earth's surface? Searching for an answer 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. (www.youtube.com)

Broadcast (1998) What drives the tectonic plates as they glide over the Earth's surface? Searching for an answer 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. (www.youtube.com)

The oceans cover three-quarters of our planet, hiding a whole other world beneath the waves. If we could pull an imaginary plug at the bottom of the sea and, layer by layer, expose the majesty and mystery of what lies beneath, we would be astounded. (www.youtube.com)

BBC Horizon - Global Weirding (2012)

The Zambezi (also spelled Zambeze and Zambesi) is the fourth-longest river in Africa, and the largest flowing into the Indian Ocean from Africa. The area of its basin is 1,390,000 square kilometres (540,000 sq mi), slightly less than half that of the Nile. The 3,540-kilometre-long river (2,200 mi) has its source in Zambia and flows through Angola, along the borders of Namibia, Botswana, Zambia again, and Zimbabwe, to Mozambique, where it empties into the Indian Ocean.

National Geographic Iceland Volcano Eruption HDTV

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