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Atlantis, a likely mythical island nation mentioned in Plato’s dialogues “Timaeus” and “Critias,” has been an object of fascination among western philosophers and historians for nearly 2,400 years. Plato (c.424–328 B.C.) describes it as a powerful and advanced kingdom that sank, in a night and a day, into the ocean around 9,600 B.C. The ancient Greeks were divided as to whether Plato’s story was to be taken as history or mere metaphor. Since the 19th century there has been renewed interest in linking Plato’s Atlantis to historical locations, most commonly the Greek island of Santorini, which was destroyed by a volcanic eruption around 1,600 B.C.
Plato’s Critias says he heard the story of Atlantis from his grandfather, who had heard it from the Athenian statesman Solon (300 years before Plato’s time), who had learned it from an Egyptian priest, who said it had happened 9,000 years before that. Whether or not Plato believed his own story, his intent in telling it seems to have been to boost his ideas of an ideal society, using stories of ancient victory and calamity to call to mind more recent events such as the Trojan War or Athens’ disastrous invasion of Sicily in 413 B.C. The historicity of Plato’s tale was controversial in ancient times—his follower Crantor is said to have believed it, while Strabo (writing a few centuries later) records Aristotle’s joke about Plato’s ability to conjure nations out of thin air and then destroy them. Atlantis Reemerges
In the first centuries of the Christian era, Aristotle was taken at his word and Atlantis was little discussed. In 1627, the English philosopher and scientist Francis Bacon published a utopian novel titled “The New Atlantis,” depicting, like Plato before him, a politically and scientifically advanced society on a previously unknown oceanic island. In 1882, former U.S. Congressman Ignatious L. Donnelly published “Atlantis: The Antediluvian World,” which touched off a frenzy of works attempting to locate and learn from a historical Atlantis. Donnelly hypothesized an advanced civilization whose immigrants had populated much of ancient Europe, Africa and the Americas, and whose heroes had inspired Greek, Hindu and Scandinavian mythology. Donnelley’s theories were popularized and elaborated by turn-of-the-20th-century theosophists and are often incorporated into contemporary New Age beliefs.
From time to time, archaeologists and historians locate evidence—a swampy, prehistoric city in coastal Spain; a suspicious undersea rock formation in the Bahamas—that might be a source of the Atlantis story. Of these, the site with the widest acceptance is the Greek island of Santorini (ancient Thera), a half-submerged caldera created by the massive second-millennium-B.C. volcanic eruption whose tsunami may have hastened the collapse of the Minoan civilization on Crete.
The video illustrates the geological formation of Santorini, the most important volcanic archipelago in Europe. Scenery animations (created with Bryce and ParticleIllusion), annimated paleogeographic maps and on site video recordings (Spring 2011) are combined.
Santorini is essentially what remains after an enormous volcanic eruption that destroyed the earliest settlements on a formerly single island, and created the current geological caldera. A giant central, rectangular lagoon, which measures about 12 by 7 km (7.5 by 4.3 mi), is surrounded by 300 m (980 ft) high, steep cliffs on three sides. The main island slopes downward to the Aegean Sea. On the fourth side, the lagoon is separated from the sea by another much smaller island called Therasia; the lagoon is connected to the sea in two places, in the northwest and southwest. The depth of the caldera, at 400m, makes it possible for all but the largest ships to anchor anywhere in the protected bay; there is also a newly built marina at Vlychada, on the southwestern coast. The island's principal port is Athinias. The capital, Fira, clings to the top of the cliff looking down on the lagoon. The volcanic rocks present from the prior eruptions feature olivine and have a small presence of hornblende.
On January 17th, 2002, Nyiragongo volcano erupted. Lava flows ran across the town of Goma (600,000 inhabitants), and ended up in Lake Kivu. At that time, the town of Goma was in the hands of Congolese rebels, supported by the Rwandan regular army, so the central government of DRC did not take any security measures for survivors and homeless people. The population had the time to run away from the town, so only some hundred people died, but thousands of houses were destroyed and the rest was pillaged by the Rwandan army.
Three years after the eruption, the inhabitants of Goma are reconstructing their houses on the solidified lava flows, on the exact spots their homes had been destroyed. If a new eruption took place, those new houses would be swept away and burnt again. The international community finances a Volcanic Observatory in Goma, where some Congolese scientists, under the supervision of famous Belgian volcanologist Jacques Durieux, try to forecast the next eruption and, with the help of the local authorities, hope to be able to evacuate the town as quickly as possible to reduce the number of victims.
Sinopse: Segundo cientistas, os vulcões têm um papel no clima e na atmosfera, e são imprevisíveis. Mas pesquisadores já conseguem prever erupções. Efeitos especiais levarão você ao interior das erupções vulcânicas mais famosas do mundo. Surpreenda-se com imagens inéditas e espetaculares.
Planeta Feroz: Vulcão [Completo Dublado] Documentário Discovery Science .
Por Favor, se alguém souber o nome desse filme me avise, só achei esse trecho e quero assistir completo. grata --atualização nome do filme--- 16/07/16 ja me disseram o nome do filme nos comentários, é "tsunami-a furia dos oceanos"
Earth's landmasses were not always what they are today. Continents formed as Earth's crustal plates shifted and collided over long periods of time. This video shows how today's continents are thought to have evolved over the last 600 million years, and where they'll end up in the next 100 million years.
Paleogeographic Views of Earth's History provided by Ron Blakey, Professor of Geology, Northern Arizona University.
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Este programa vai mais além das imagens extraordinárias das Grandes Migrações e mostra as investigações científicas relacionadas com estes espetáculos magníficos da natureza. Os avanços tecnológicos e de obtenção de dados estão revelando a interessante dinâmica interna de manadas, revoadas e cardumes.