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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
Prehistoric America
Prehistoric America

   2003    Nature
How to Grow a Planet
How to Grow a Planet

   2012    Science
Ancient Rome
Ancient Rome

   2006    History
Cosmos
Cosmos

   1980    Science
Neanderthal
Neanderthal

      History
Life In Cold Blood
Life In Cold Blood

   2008    Nature
The Story of Maths
The Story of Maths

   2008    Science