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Heaven and Hell

   1980    Science
Sagan discusses comets and asteroids as planetary impactors, giving recent examples of the Tunguska event and a lunar impact described by Canterbury monks in 1178. It moves to a description of the environment of Venus, from the previous fantastic theories of people such as Immanuel Velikovsky to the information gained by the Venera landers and its implications for Earth's greenhouse effect. The Cosmos Update highlights the connection to global warming.
Series: Cosmos
The Story of China
The Story of China

   2016    History
Wild South America
Wild South America

   2005    Nature
Inner Worlds Outer Worlds
Inner Worlds Outer Worlds

   2012    Culture
The Big Think
The Big Think

   2017    Technology
Generation Iron
Generation Iron

   2017    Culture
How to Grow a Planet
How to Grow a Planet

   2012    Science
Life of a Universe
Life of a Universe

   2017    Science
Roman Empire: Reign of Blood
Roman Empire: Reign of Blood

   2016    History