视频简介
Changes that reverberated throughout the world wrought by one man. A film summing-up the life of a man who changed the world in the 20th century. Gorbachev's short time in power was marked by the collapse of this empire. He was the architect of Glasnost and Perestroika, policies that gave the citizens of the Soviet Union - what Ronald Reagan called "the Evil Empire" - a chance ...。From PBS - Italy's Mystery Mountains explores the fascinating geologic story of Italy, the land known for its fabulous art, fantastic food, opera, the dolce vita, and so much more. What's less known about Italy is the diversity and turbulence of the geology behind all of this abundance: the continuously erupting volcanoes, the violent earthquakes, the clash of mighty tectonic p...。
